2018 MAZDA CX-5 Engine Problems

I own a Mazda that I purchased new in 2018. I have kept up with the maintenance to a “T”. I have never abused it. About a month ago I started smelling a strange smell. Like smoke or burnt oil. A couple of weeks later, the engine oil level light came on and the engine was low on oil and that’s when I started seeing that the motor was leaking oil, and I just found out that the engine head cylinder has a crack. I found out that these vehicles have a defect from the factory on this part that cracked, “Engine Head cylinder”. And now to repair it, it is going to cost me around $6,000. The warranty has run out.

Had an slow oil leak. The cylinder head was cracked in my engine

Many incidents have occurred with this vehicle. First occurrence happened 11/25/21. Attempting to pass another vehicle and the car began slowing down and various warnings came on. Pulled off to the side of the road, turned off the vehicle and restarted without any further incident. This same thing happened 2 times in 12/2021 both time attempting to pass another vehicle. 2nd time in December the check engine light came on. Scheduled to be seen by a mechanic with the earliest appointment on 12/31/21. Mechanic recommended taking to a licensed Mazda mechanic. Appointment was on 01/07/22. They looked at the car and fixed the issue. Can't remember the issue at that time. By 05/2022, check engine light came back on and car would start slowing down and shutting off when attempting to pass another vehicle. If RPMs would go to high, car would do this. Check engine light came back on....

On 7/30/23, I was driving home from church, and was driving on the freeway in the fast lane when my 2018 Mazda Cx-5, that was only 5 years old, with only over 33.2K miles on it, started to stall. Thankfully, it didn't come to a complete stop, but slowed down tremendously, and had at least 5 malfunctioning lights come on all at once. The car wouldn't go over 25 miles afterwards. I was very thankful to make it home safely, but this was very alarming, since I never had any issues with that car, and always kept it very well maintained. For a car that was only 5 years old and had only 33.2K miles on it, to experience such a drastic problem, is very confusing. It was very concerning that the car almost came to a complete stop unexpectedly without any warning ahead of time, especially while driving in...

When I turn my car off I get ignition switch and it stalls then my engine come on and off

The contact owns a 2018 Mazda CX-5. The contact stated that while stopped at a traffic light, the contact became aware of smoke coming from underneath the hood. The vehicle was taken to an independent mechanic and the contact was informed that the cylinder head was defective and needed to be replaced. The manufacturer was made aware of the failure. The failure mileage was approximately 62,400. The contact stated the cylinder head is porous and oil leaks out of it. Also, 6 hydraulic lash adjusters were failing and needed to be replaced.

Engine oil started leaking after I noticed smoke coming from the hood of the car. No warning signs, no check engine light, nothing to indicate any issues until this occurred. Took the car to the dealership who confirmed it was a cracked cylinder head which is now being replaced.

Driving down the freeway smoke started coming out of the hood of the car and into the cabin, no warnings or warning lights of any kind, got the car to the Mazda dealer to be inspected. The dealer told me it was 5 months out of warranty and would not be covered its a cracked cylinder head and oil had dripped/leaked onto the manifold causing the smoke. No smoke was coming from the exhaust so the crack only leaked oil to the outside of the cylinder head. There is no oil in my driveway so it happened that day on the road. This is a manufacturing error that Mazda won't take responsibility for.

When driving I started to smell a burning oil or rubber smell inside the cabin of the car. When I stopped I could see smoke coming from under the hood. When I was able to park, I opened the hood and could see smoke coming from the engine. There were no warning lights displaying on the dash, no leaking fluid from under the car. I did not feel safe continuing to drive the car without having it seen, so I took it to the closest Mazda dealer service. After inspecting the issue I was told there is a cracked cylinder head that is leaking fluid into the engine and the exhaust and I would need a brand new engine. The service manager said this is a known issue with the 2018-2021 Mazda CX-5. Unfortunately, the warranty that would cover this expired in April 2023 (at the time of writing this,...

Crack in cylinder head at 25k caused oil to leak and engine to smoke while driving. No warning lights came on. Dealership replaced the part but how do I know it won't happen again? Mazda knows about this but has not issued a recall or extended the powertrain warranty to cover this known manufacturing defect.

Oil drained to warning level from full during a vacation. The oil leaked out around head gasket level onto every part of the engine below it and the movement of air caused oil droplets to fall on the exhaust and smoke and also coated entire underneath and most of rear hatch with oil droplets.

2018 Mazda CX-5. While driving a burning smell was detected (oil). Oil leakage noticed when car parked. The vehicle was taken to the dealer where it was diagnosed with a cracked cylinder head. There is a service bulletin stating defect in engine head. Mazda will not cover costs, as its outside 60,000 mile warranty. Quote given of $4085 to fix issue. The vehicle was not repaired. The manufacturer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 85000.

After driving when I got off my car, I could smell something burned. I took my car a dealer shop, and they found the Crack in a cylinder head. The cylinder head has been fixed, but I can still smell something is burning.. I am not sure it is totally fixed or not.

2023 02 28, 36410 miles - Engine oil burning smell entering the cabin of the car, oil leaking from engine. No warning lights. Diagnosed by Mazda dealer as a cracked cylinder head, will be repaired under warranty. Discovered Service Alert #SA-013/22 that applies to this defect. 2023 02 23, 36,389 miles - Car in for an oil change under extended service program at Mazda dealer. Dealer discovered the timing chain cover leaking, repaired under warranty. Owner also reported that information screen has been malfunctioning intermittantly. Dealer remarked that the screen does have problems, but that it is not covered by the warranty, and would need to be replaced within the next two years and would cost about $2000. Upon vehicle pick-up, several warning lights went on, dealer reprogrammed the code system, test drove, pronounced the lights indicated nothing was wrong. 2022 08 17, 31,174 miles - Fuel pump replaced under...

Mechanic stated engine cylinder head oil hole leak. Seems to be manufacturer defects

Cracked cylinder head, significant oil leaking, no engine lights. No past collisions in vehicles or indicator engine was running hot. Dealership reported they see no history of fault codes on vehicle computer.

On 12/23 I was driving on the highway approaching exit 43 A-B on I-95 N and the engine oil light came on, I started monitoring the temperature of the car and it was holding steady, neither was it dropping nor was it overheating. I continued driving for a minute more, I am half mile away from home at this point and I smelled burning oil. I pulled the car over and opened up the hood, I turned on the flashlight on my phone and I could see oil on the engine floor. I called up Mazda dealership near me and they were closed for the holidays so I left voicemails. After a couple of days of no answers, I was able to get through to someone and they said they'll take the car in however they can't guarantee if they will be able to even look at it until after...

After driving for approximately 1 minute, the vehicle approached a stop sign and car stalled and would not restart. When attempting to restart vehicle, engine was firing but not turning over. Attempted to jump start the vehicle with no success until vehicle was given throttle at which point it restarted. No lights were illuminated prior to the incident, but when the vehicle stalled the battery light and check engine light illuminated.

What component or system failed or malfunctioned, and is it available for inspection upon request? Engine Heads Cracked How was your safety or the safety of others put at risk? Smoke from engine bay and fumes entering cabin via AC vents. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Inspected by Mazda dealer and confirmed defective header from manufacture. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warning lamps, burning smell Burning oil smoke from engine bay. Smoke order enters cabin via AC vents odor very strong. Appeared at 28,000 odometer mileage.

The contact owns a 2018 Mazda CX-5. The contact stated that while driving at an undisclosed speed, a burning odor was detected with smoke coming from underneath the hood. The vehicle was taken to the dealer where it was diagnosed with a cracked engine block. The vehicle was not repaired. The manufacturer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 125,000.

Hello, I am writing to you for a possible failure post update to the software as specified in Recall 19V-497 dated 09/06/2022 found on the manufacturer's recall website (https://www.mazdarecallinfo.com/). The status is marked as CLOSED. However, I faced the exact problem yesterday as described in the Safety Risk section of the recall details on their website (Summary section on NHTSA website). Below is my best attempt to describe my event: Event: I made a stop at a red light. As it turned green, I accelerated and the engine shut off/stalled. I pushed the engine stop button, switched gear to "P", and the car won't start at all. I was also not able to press the brake or accelerator. I was not able to move the gearstick. Safety risk: My car stalled in the middle of the road. It was a busy junction. If this occurred on a highway, it is...

oil leak from a cracked cylinder head, common issue seen

Driving on highway going 70-75 mph, all of a sudden car starts to stall, check engine light lights up informing me keyless, power steering, vehicle system, smart brake malfunction. I almost crashed as I was on I-55 heading to downtown Chicago. My girlfriend and I could have died.

MAGNA MOTORS IN EVANSVILLE, INDIANA IS REFUSING TO ADDRESS THE FUEL PUMP RECALL ON MY 2018 MAZDA CX-5. THEY CLAIM THERE ARE NO PARTS TO FIX IT SO THEY CANT HELP ME. MY VEHICLE DOESNT START HALF THE TIME AND THEY REFUSE TO PROVIDE A LOANER UNTIL MINE IS FIXED. THERE HAS TO BE SOMETHING THEY CAN DO.

The contact owns a 2018 Mazda CX-5. The contact received notification of NHTSA Campaign Number: 21V875000 (Fuel System, Gasoline) in January of 2022 however, the part to do the recall repair was not yet available. The dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that the engine was not stable while driving under 30 MPH. There was no warning light illuminated. The vehicle was taken to the dealer who stated that there was no failure and that the issue was normal. The manufacturer was notified of the failure and a case was opened. The contact stated that she had an arbitration hearing with the manufacturer. The manufacturer was contacted and confirmed that the parts were not available. The approximate failure mileage was 17,000. VIN tool confirms parts...

My wife was pulling into a parking place today with her foot on the brake when the car suddenly accelerated, causing it to jump a curb and come to a stop over two large shrubs, which saved her from entering a busy highway and colliding with another car. This caused damage to the front end of the car and wheel wells. She told me she absolutely did not have her foot on the accelerator at the time. The cruse control was off and the driver's side floor mat was not out of position. She was not injured and the air bags did not go off. We have not yet taken this vehicle in for inspection of this defect. It is in the repair shop right now for body work. Our insurance company has been notified. My wife did not report any warning lights. The vehicle is available for inspection. Prior...

2018 Mazda CX5 with 62000 has an oil leak coming from what the Mazda dealership in Barre VT say it is the cylinder head and gasket have gone faulty for a repair price of $4,191 and that this is a known issue. I had no lights letting me know of an oil leak, the only way I knew it was leaking was because I smelled burnt oil and then looked under the car to see the drops from the leak. My complaint is if Mazda Corporation knows its a known issue and know it can cause a fire why does it not issue a recall. An engine should not be having faulty cylinder and gaskets at only 62,000 miles.

The engine has a massive oil leak that seems to be more common than Mazda will admit. The safety-related issue is the oil pours out like pancake syrup which can be bad for other drivers, the environment and cause road asphalt to break down at a rapid pace. I also don't have a warranty. When I consulted Mazda all they wanted to do is charge me $7,000 for a new engine from all the research I found on the internet. This is a problem that is affecting many people because when you only have one vehicle and have no way to make money. Most people will just keep adding oil to keep it going. Many customers are left with a car payment with no way out and a car they can't really drive other than short distances. Something needs to be done to hold them accountable for this common problem....

There is no recall on this which is a huge safety issue. This has happened to me on highway several times and Mazda will not do anything about it. Very dangerous when you are going 65 on a highway! TSB Number 01-007/19- misfire P0304- of 4th cylinder. Recommendation to replace main silencer due to condensation accumulation in the exhaust baffle. Please search the TSB and misfire code I provided to learn more about it. If you are out of warranty. You are out of luck with Mazda. I will take upon myself to educate others where Mazda could careless to correct this or let the public now.

While driving, my car has stopped two times. first time I crashed on the side of road causing all of my tires and rim busted and had to replace all of them. I had no idea what was going on. second time I was taking kids to school where can just stopped in the middle of road and restarted. Recently it was smelling so I took it to dealer where they said its one of the cylinder and its not safe to drive so they replaced it as its under warranty. While my car is been with Mazda dealer I have been using their loaner car. but then received this letter of Safety recall on similar issue i had in the past and i have been trying to contact Mazda but no success. no email, chat or phone call response. I do not feel safe to drive this car which...

Massive oil leak onto exhaust manifold, dealership checked and found oil leaking from right rear area of cylinder head. "Per SA/031/21 should replace cylinder head and all gaskets and hardware". My safety and the safety of others was put at risk because if my car had no oil in it, which it was close to, the engine could have seized and caused an accident. The fumes of burning oil made me severely ill as well. The problem was confirmed by the Mazda dealership and has been inspected as well. The only reason I knew something was wrong was because the oil light came on and I contacted the dealership and they said it was a sensor issue and I did not believe that they were correct so I brought it in and they looked at it and said it was a massive oil leak and then told me that the...

This is more of a general notice to fellow Mazda CX-5 drivers with the issue described below: Our car is a 2018 CX-5 with 25K miles. The check engine light came on upon entering the highway at the beginning of the day. Subsequently, stopping by an AutoZone to diagnose it revealed a malfunctioning thermostat. Only then did I realize the car took a long time to reach the operating temperature (for the blue indicator light to go away), and engine temperature would generally stay around 165 and hit 210 only after a very long time of driving, while idling or in traffic. However, our internal heater performance never had any issues while being kept at 75 and blowing mild to moderately. Upon taking the car to our Mazda dealership and requesting a diagnostic service, did we learn it was a malfunctioning coolant control valve that there is a technical service...

Engine light came on, pulled over to the side to open the hood. Engine was smoking and oil was leaking all over the floor. Checked the oil dipsitick, still had oil but could smell the burnt oil. Towed the truck to the dealers and said its Engine head cylinder is cracked.

The vehicle stall at very low speed in a parking lot could not restart it was turning over the battery was fine came back 3 hours later and was able to start

Engine turned off while making a k turn. This is the same issue I experienced in 2019. Mazda issued a recall for software malfunction shortly thereafter and my car was serviced as part of this recall (NHTSA campaign number: 19V497). But now the exact issue happened again last week.

Will not accelerate at times no matter how far you press down on gas pedal and will stall right after. I will pull over shut off vehicle and restart. This sometimes corrects the problem right away. Other times it lasts longer. System malfunction light randomly comes on.

Approximately 9:15am 5/16/21 I was driving on the road when my engine stalled and went out. Was stuck in the middle of the road for a couple of minutes while I tried to restart the car. My vehicle was recalled for this very purpose but 13 days prior I went into the dealership to fix the issue and get a software update. After said update I experienced the recall issue on my vehicle.

SITUATION: DRIVING UPHILL ON HWY 120 ON NEW PRIEST ROAD, BIG OAK FLAT, CA, TWO LANE MOUNTAIN ROAD. SLOW CAR IN FRONT OF ME AND A DELIVERY TRUCK TAILGATING. SLOW CAR EVENTUALLY MOVES ASIDE IN A TURNOUT AND I ACCELERATE TO OPEN UP SPACE BETWEEN MYSELF AND WHAT I THOUGHT WOULD BE THE TRUCK BUT SOMEHOW THE SLOW CAR RETURNED TO THE DRIVING LANE AHEAD OF THE TRUCK. I CONTINUE TO ACCELERATE TO ATTEMPT TO OPEN UP SPACE BETWEEN MYSELF AND THE CAR BEHIND ME WHEN I LOST POWER, THE CAR BEHIND ME MOVES TO THE OPPOSING TRAFFIC LANE TO AVOID REAR ENDING MY CAR THAT IS RUNNING IN DEGRADED MODE (ACCELERATOR HAS NO EFFECT, BASICALLY MOVING ON IDLE POWER) AND NARROWLY MISSES AN ONCOMING CAR AS I MOVE TOWARDS THE RIGHT EDGE OF THE RIGHT LANE. TRUCK BEHIND ME HAS TO BRAKE HARD TO AVOID REAR ENDING ME. THERE...

WHEN TAKING VEHICLE IN FOR RECOMMENDED 45K MILE SERVICE, DEALER DISCOVERED WARPED HEAD CYLINDER AND LEAKING OIL. NO CHECK ENGINE LIGHT WARNING EVER CAME ON! NO WARNING. MAZDA IS REPLACING ENGINE PARTS UNDER VEHICLE WARRANTY

I PURCHASED THIS VIN LESS THAN 24 HOURS AGO, I WAS TOLD IT WAS CERTIFIED BY THE DEALERSHIP. IN LOOKING UP THE VIN ON WWW.NHTSA.GOV THIS AM, IT SAYS THE RECALL #3719F WAS NOT FIXED; THE DEALERSHIP JUST SENT ME A SCREEN SHOT FROM MAZDA NORTH AMERICA OPERATIONS WARRANTY VEHICLE INQUIRY REPORT, AND IT SHOWS THE REPAIR DONE. WHO DO I BELIEVE? THE VEHICLE IS AT MY HOME ON THE DRIVE WAY, STATIONARY. I'M ASKING THE DEALERSHIP TO PICK THE CAR UP, AND REFUND MY $100 DOLLARS. THEY WANT $400.00 MORE WHEN I GET PAID 2/25.

I WAS DRIVING ON THE HIGHWAY AND IT WAS RAINING. I LOST CONTROL OF THE VEHICLE, THE STEERING WHEEL WAS SPINNING UNCONTROLLABLY. I WAS ADVISED I MOST LIKELY HYDROPLANED. THE VEHICLE FINALLY SLOWED DOWN AND BACKED INTO A GUARDRAIL. ONLY THE RIM OF THE DRIVER SIDE BACK TIRE WAS DAMAGED. THE IMPACT FELT LIKE THE IMPACT FELT WHEN HITTING A CURB TOO HARD. THIS DID NOT HAPPEN ON THE SIDE OF THE ROAD WITH A SHOULDER, SO AFTER THE TIRE HIT THE GUARDRAIL, I MOVED TO THE CAR TO THE OTHER SIDE OF THE ROAD TO BE ON THE SHOULDER. ONCE I ARRIVED AT THE OTHER SIDE OF THE ROAD, THE AIRBAGS DEPLOYED AND THE BRAKE ASSIST LIGHT CAME ON AND THE POLICE WERE AUTOMATICALLY CALLED. THE CAR WAS TOWED AND THE COLLISION SHOP CANNOT EXPLAIN WHY THE AIRBAGS DEPLOYED. I'M TERRIFIED THAT THE AIRBAGS CAN DEPLOY AT ANY TIME...

TL* THE CONTACT OWNS A 2018 MAZDA CX-5. THE CONTACT STATED WHILE DRIVING AT LOW SPEEDS, THE VEHICLE STALLED AND WAS RESTARTED. WHILE THE PUSH-TO-START WAS ENGAGED, THE VEHICLE REVVED UP HIGH, STALLED, AND RESTARTED. ADDITIONALLY, THE AIR CONDITIONER FAILED TO OPERATE AS DESIGNED. THE RADIO WAS ALSO INOPERABLE. THE CHECK ENGINE WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO GUNTHER MAZDA (1800 S STATE RD 7, FORT LAUDERDALE, FL 33317, (954) 420-6565) WHERE IT WAS DIAGNOSED THAT THE BATTERY, A/C MOTOR AND AN UNKNOWN CONTROLLER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED SEVERAL TIMES HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS CONTACTED HOWEVER, NO FURTHER ASSISTANCE WAS PROVIDED. THE FAILURE MILEAGE WAS 2,000.

2018 MAZDA CX-5 GRAND TOURING. ALTERNATOR/AC SERPENTINE BELT TENSIONER LEAKS OIL (ITS HYDRAULIC) AND IF FAILS COULD CAUSE BELT TO COME OFF WITHOUT WARNING AND LEAVE YOU STRANDED. DEALERSHIP INDICATES THIS IS NOT WARRANTED.

ON MAY 9, 2020, OUR MAZDA CX5 LOST THRUST, STALLED AND CAME TO A COMPLETE STOP WHILE DRIVING ON A HIGHWAY GOING 55 MPH ON A STRAIGHT 3 LANE ROAD. THIS OCCURRED DESPITE THE PCM PROGRAMMING WAS RE-CALIBRATED DUE TO A MANUFACTURER RECALL IN SEPTEMBER 2019 (NHTSA RECALL NO. 19V497000). THE CAR IS TOWED TO A MAZDA SERVICE CENTRE AND IS AWAITING DIAGNOSIS. *TR

THE ENGINE IN MY MAZDA CX-5 WAS REQUIRED TO BE REPLACED RECENTLY DUE TO A KNOWN ISSUE IN THE CAR THAT CAUSES THE REAR HEAD TO LEAK. MY CAR HAS LESS THAN 12,000 MILES ON IT SO THE ENGINE SHOULD NOT HAVE THIS ISSUE. MY DEALER EXPLAINED TO ME THIS IS A KNOWN ISSUE BY MAZDA AND HE HAD SEEN 5-10 OTHER CARS JUST AT HIS DEALER. WE NOTICED THIS ISSUE WHEN MY SON WAS DRIVING THE CAR AND WE SAW FLUID POURING OUT OF THE BOTTOM. WE HAD HIM STOP THE CAR IMMEDIATELY AND NOT DRIVE. I TRIED NUMEROUS TIMES TO GET MAZDA TO ENGAGE TO PROVIDE A BETTER WARRANTY GIVEN IT IS A NEW CAR SHOULD NOT HAVE A BLOWN ENGINE WITH ONLY 12,000 MILES AND IT IS A KNOWN ISSUE BUT THEY REFUSED TO PROVIDE ANY SUPPORT. I ASKED ABOUT WHY NO RECALL AND THEY JUST STATED...

MAZDA CX-5. CONSUMER WRITES IN REGARDS TO VEHICLE BEING TOTALED AS A RESULT OF LOSS OF ENGINE POWER. *LD *JS

TL* THE CONTACT OWNS A 2018 MAZDA CX-5. WHILE DRIVING 20 MPH AND BELOW, THE VEHICLE FAILED TO ACCELERATE. THE CONTACT HAD TO DEPRESS THE ACCELERATOR PEDAL WITH FORCE TO INCREASE THE SPEED. THE CONTACT TOOK THE VEHICLE TO FINDLAY MAZDA (7760 EASTGATE ROAD, HENDERSON, NV 89011, (702) 955-5555) TO BE REPAIRED PER NHTSA CAMPAIGN NUMBER: 19V497000 (ENGINE, POWER TRAIN); HOWEVER, THE REPAIR DID NOT CORRECT THE FAILURE. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER, BUT THEY WERE UNABLE TO LOCATE ANY FAILURE CODES. THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBER: 1-2318934006. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 24,800.

TL* THE CONTACT OWNS A 2018 MAZDA CX-5. WHEN THE ENGINE WAS WARMED UP AND THE VEHICLE WAS PLACED IN PARK, THE ACCELERATOR PEDAL AUTOMATICALLY DROPPED TO THE FLOORBOARD. THE FAILURE CAUSED THE VEHICLE TO DRIVE FORWARD AND THE DRIVER TO LOSE CONTROL OF THE VEHICLE. THE VEHICLE WAS TAKEN TO ROGER BEASLEY MAZDA GEORGETOWN (7551 IH 35 SOUTH, GEORGETOWN, TX 78626, 512-591-9313) TO BE DIAGNOSED, BUT THE FAILURE COULD NOT BE DUPLICATED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 7,226. *BF*JB

VEHICLE WENT INTO LIMP MODE WHILE PASSING ON TWO LANE ROAD. CAUSE WAS DETERMINED TO BE WRONG LOGIC IN PCM FOR CYLINDER DEACTIVATION. THIS WORNG LOGIC CAUSED LOW OIL PRESSURE IN THE LIFTER DURING DEACTIVATION WHICH IN TURN CAUSED THE ROCKER ARM TO BECOME DISLODGED RENDERING THE ASSOCIATED VALVE INOPERABLE. THERE IS NO INDICATION TO THE DRIVER OF IF OR WHEN THIS HAPPENS. THE DRIVER IS THEN DRIVING THE CAR IN A VERY DANGEROUS STATE. THE PROBLEM ARISES WHEN THE THE RPMS BECOME ELEVATED TO AROUND 5000 RPMS AND ABOVE. AT THIS POINT THE COMPUTER SENSES TROUBLE WITH THAT CYLINDER DUE TO THE AIR FUEL RATIO NOT BEING CORRECT AND THROWS THE ENGINE INTO LIMP MODE. CREATING A VERY DANGEROUS SITUATION IF YOU ARE TRYING TO PASS OR AVOID SOMETHING WHERE YOU NEED THE ACCLERATION. EXTREMELY DANGEROUS!! WHEN I TOOK MY VEHICLE INTO MY DEALERSHIP THEY DISCOVERED THE MISFIRE ON...

JUNE 4 2018 MY BRAND NEW 2018 MAZDA CX 5 THAT I BOUGHT FROM MARIN MAZDA IN SAN RAFAEL CA DRIVING ON FREEWAY AT APPROXIMATELY 68 MPH MY CAR SUDDENLY IS SLOWING DOWN- LIKE SELF BRAKING ON ITS OWN- I WAS NOT BRAKING- THIS WAS HAPPING WHILE I WAS ACCELERATING -IT FELT LIKE I WAS TOWING A LARGE TRACTOR - THIS RESISTANCE KEEPS RECURRING CAUSING SAFETY CONCERN AS WELL AS BAD GAS MILEAGE- WHILE THIS ISSUE IS HAPPENING I GET BETWEEN 15 -17 MILES PER GAL. - TOOK PICTURES OF FUEL MONITORING SYSTEM. HAVING TO MAKE MY WAY TO THE NEAREST EXIT WITH CARS HONKING AT ME WAS DANGEROUS. CAR HAD 350 MILES ON IT. TOOK CAR BACK TO MARIN MAZDA A COUPLE DAYS LATER FOR THIS ISSUE AND BECAUSE IT IS VERY LOUD WITH EXCESSIVE ENGINE NOISE WHEN STARTED EVERYDAY. VERY CONCERNING AS TO IT BEING A NEW CAR....