NHTSA Complaint #11513654 — 2013 JAGUAR XF

The car employs a start/stop system to shut the engine when stopped. When it restarts the engine, the idle speed drops to about 400 RPM (half normal idle) and surges when it recovers. It has also stalled several times. I've asked the dealership to fix this, but when at the dealer, the system would not shut the engine so they have not verified the issue. The first safety issue happens if the driver is not expecting the surge resulting in sudden acceleration. The second issue happened when the car stalled at an intersection with other cars trying to get by. This has happened many times since I purchased the car in 2015. The stop/start function stopped working for a period of time when the primary battery was older and weak. Since replacing the batter, this is happening more frequently now. I did find this issue on KBB's website, but not on yours https://www.kbb.com/jaguar/xf/2013/recall/