NHTSA Complaint #10241880 — 2004 BMW Z4

WHEN AMBIENT TEMPERATURES ARE HIGH (E.G. >85-90F) (COMPOUNDED BY CAR BEING IN DIRECT SUNLIGHT), THE STEERING BECOMES DIFFICULT TO CONTROL. SPECIFICALLY, NORMAL STEERING WHEEL INPUT TRANSLATES INTO ERRATIC, JERKY MOVEMENTS ON THE ROAD. THE STEERING WHEEL WILL NOT RETURN TO CENTER AND THE CAR GENERALLY IS DIFFICULT TO CONTROL (I.E. MAINTAIN A STRAIGHT COURSE, REQUIRING CONSTANT AND EXAGGERATED STEERING WHEEL INPUT). THIS CONDITION IS TRANSIENT (I.E. STEERING RETURNS TO NORMAL WHEN THE AMBIENT TEMPERATURE DROPS); HOWEVER, DRIVING WHEN THE STEERING IS COMPROMISED AS DESCRIBED ABOVE IS UNNERVING AND WITHOUT A DOUBT INCREASES THE RISK OF AN ACCIDENT OCCURRING DUE TO A POTENTIAL LOSS OF DRIVER CONTROL (E.G. ON WET ROADS, MULTI-LANE HIGHWAY TRAFFIC). WHEN THIS OCCURRED A SECOND TIME, I IMMEDIATELY TOOK THE CAR TO THE BMW DEALERSHIP TO REPORT IT. THE BMW DEALERSHIP SUBSEQUENTLY CONFIRMED THE PROBLEM AS DESCRIBED ABOVE AND DIAGNOSED A FAILED STEERING COLUMN UNIT. BMW NA HAS OFFERED TO PAY FOR 50% OF THE REPAIR WITH THE OTHER 50% BEING OWNER'S RESPONSIBILITY (CAR WAS APPROX. 2.5 MONTHS OUT OF WARRANTY). JUDGING FROM THE PROPORTION OF SIMILAR COMPLAINTS FILED WITH NHTSA ON THE Z4, THIS ISSUE DOESN'T APPEAR TO BE ISOLATED AND WARRANTS FURTHER INVESTIGATION. *TR