2006 BMW Z4 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2006 BMW Z4, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Steering5552.4%
- Airbags1413.3%
- Electrical1312.4%
- Engine98.6%
- Exterior lighting43.8%
- Interior & seats32.9%
- Driver assistance21.9%
- Fuel system11.0%
- Body & structure11.0%
- Tires & wheels11.0%
- Transmission11.0%
- Visibility11.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
The electronic steering has failed several times while driving. This makes it very difficult to maintain a lane and avoid other vehicles. This problem continues intermittently. Thousands of Z4 owners have reported the same issue in online forums.
In hot weather, the steering binds, making keeping the car in the correct lane extremely difficult. The car will dart from one side to the other. The car will be nearly impossible to keep in the correct lane.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
ABOUT 9 YEARS (2015) AFTER PURCHASING VEHICLE THE AIRBAG WARNING LIGHT BEGAN ILLUMINATING CONSTANTLY. THE VEHICLE WAS PURCHASED NEW AND HAD APPROXIMATELY 55K MILES WHEN ISSUE BEGAN. VEHICLE HAS NEVER BEEN IN A MINOR OR MAJOR ACCIDENT. VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, BUT DIAGNOSIS COULD NOT BE DETERMINED. CONTACTED BMW ABOUT ISSUE, BUT WAS TOLD MY VEHICLE WAS NOT COVERED UNDER ANY OF THE AIRBAG RECALLS THEY'VE INITIATED. NO ACTION WAS TAKEN BY ME TO DETERMINE ROOT CAUSE AND CONTINUED TO UTILIZE VEHICLE WITH AIR BAG LIGHT ALWAYS ILLUMINATED. IN FEBRUARY 2018, RECEIVED A LETTER FROM BMW REGARDING WARRANTY EXTENSION TO 15 YEARS FOR FRONT PASSENGER SEAT OCCUPANCY MAT (OC3) FOR AIR BAG SYSTEM. BELIEVING AIRBAG ISSUE WAS DUE TO OC3 MAT, BROUGHT MY VEHICLE TO LOCAL BMW DEALER TO GET REPAIR. BMW DIAGNOSED THE ISSUE AS A "RESTRAINT PASS LOWER BELT UNIT FAULTING" AND NOT OC3 MAT. HAD REPAIR PERFORMED SUCCESSFULLY.
TL* THE CONTACT OWNS A 2006 BMW Z4. THE CONTACT STATED THAT THE AIR BAG WARNING INDICATOR REMAINED ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOISED THAT THE OCCUPANT PROTECTION MAT WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REAPIRED. THE VEHICLE WAS PREVIOUSLY REPAIRED UNDER NHTSA CAMPAIGN NUMBER: 13V564000 (AIR BAGS). THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 65,000.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
I have just found out that my 2006 BMW Z4 Convertible has serious wiring issues. The wires for example on my front headlights the insulation is falling off the and leaving bare wires. I am very concerned this could be a fire safety issue that could result in bare electrical wires shorting together and starting a car fire. My research shows that many people who have 2006 BMW Z4 Convertibles are having this same issue. This seems to be a real issue with BMW using cheap wiring harnesses material and over time due heat and cooling is cause the insulation to fail and resulting in this issue.
WENT TO CHANGE MY HEADLIGHT BULB AND NOTICES ALL OF THE WIRES WERE BARE. THE SHEATHING AROUND THE WIRES HAVE ALL CORRODED. THIS IS FOR THE COMPLETE HEADLIGHT ASSEMBLY. EVERY SINGLE WIRE HAS CORRODED. SEEMS LIKE A FIRE HAZARD.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
The contact owns a 2006 BMW Z4. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic who diagnosed that the PCV valve heater needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 50,000. VIN tool confirms parts not available.
The contact owns a 2006 BMW Z4. The contact received a notification for NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was unavailable. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer had been notified of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure. VIN tool confirms parts not available.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
I have just found out that my 2006 BMW Z4 Convertible has serious wiring issues. The wires for example on my front headlights the insulation is falling off the and leaving bare wires. I am very concerned this could be a fire safety issue that could result in bare electrical wires shorting together and starting a car fire. My research shows that many people who have 2006 BMW Z4 Convertibles are having this same issue. This seems to be a real issue with BMW using cheap wiring harnesses material and over time due heat and cooling is cause the insulation to fail and resulting in this issue.
THE INSULATED WIRING INSIDE THE HEADLIGHT HOUSING HAS HARDENED AND THE INSULATION HAD CRACKED AND FALLEN OFF. THIS ALLOWS THE WIRES TO SHORT AND CAUSES UNEXPECTED FAILURE OF THE HEADLIGHTS, PARKING LIGHTS, TURN SIGNALS AND OTHER ITEMS INSIDE THE HEADLIGHT HOUSING. THE LIGHTS FAILED UNEXPECTEDLY AND INTERMITTENTLY.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
MY CAR HAD APPROXIMATELY 65K MILES ON IT WHEN THE LIGHT ON THE DASHBOARD INDICATED AN ISSUE. IT WAS MANUFACTURED IN 08/06. READING FROM THE COMPUTER INDICATED A PASSENGER OCCUPANCY MAT FAILURE. BMW EXTENDED THE WARRANTY FOR 10 YEARS THROUGH MODEL YEAR 05 BUT WON'T DO ANYTHING FOR 2006. I CALLED BMW USA AND ESCALATED IT. THEY CALLED ME BACK AND STATED IT WILL NOT BE COVERED. I AM CONCERNED THAT THIS MAY PREVENT THE AIRBAG FROM OPERATING IN CASE OF A COLLISION FOR THE PASSENGER. THERE ARE MANY COMPLAINTS ABOUT THE 2006 MODEL OCCUPANCY MAT WITH THIS MY AND I THINK BMW SHOULD BE FORCED TO COVER THIS SAFETY HAZARD. THE CAR WAS PURCHASED FROM BMW DEALER AS A PRE-OWNED CERTIFIED CAR UNDER FULL WARRANTY. THE DEALER WOULD NOT ADDRESS REPAIRS UNDER THE CURRENT RECALLS. THIS SHOULD BE COVERED THE SAME WAY AS PREVIOUS MODEL YEAR Z4 VEHICLES. ACCORDING TO RECALL 13V-564 THIS SHOULD BE COVERED BUT BMW SAYS NO! HTTP://WWW-ODI.NHTSA.DOT.GOV/OWNERS/SEARCHRESULTS?REFURL=EMAIL&SEARCHTYPE=ID&TARGETCATEGORY=R&SEARCHCRITERIA.NHTSA_IDS=13V564
THE PASSENGER SEAT AIRBAG SEAT MAT SENSOR SHORTED. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2006 BMW Z4. THE CONTACT STATED THAT THE VEHICLE SUDDENLY ACCELERATED INDEPENDENTLY. THE FAILURE WAS EXPERIENCED SEVERAL TIMES WHILE DRIVING AT VARIOUS SPEEDS. THE CONTACT BELIEVED THAT THE CRUISE CONTROL CAUSED THE VEHICLE TO SUDDENLY ACCELERATE BECAUSE ONCE THE VEHICLE DECELERATED TO NORMAL SPEED, THE VEHICLE CONTINUED TO ACCELERATE GRADUALLY AT A HIGHER SPEED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE A DIAGNOSTIC WAS PERFORMED THAT WAS UNABLE TO LOCATE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS LEFT WITH THE DEALER FOR FURTHER INSPECTION. THE FAILURE MILEAGE WAS 44,000 AND THE CURRENT MILEAGE WAS 54,000.
THIS REPORT CONCERNS A SAFETY ISSUE WITH A 2006 BMW Z4 WITH A 3.0 ENGINE AND AUTOMATIC TRANSMISSION. THE VEHICLE HAS AN INTERMITTENT PROBLEM THAT BEGAN EARLIER THIS YEAR. THE VEHICLE WILL BEGIN ACCELERATING WITHOUT DEPRESSING THE ACCELERATOR AND WILL SOMETIMES MAINTAIN A CONSTANT SPEED WHEN THE FOOT IS TAKEN OFF THE ACCELERATOR. IT WILL ACCELERATE WELL PAST 100MPH WITHOUT STOPPING. THE THREE WAYS THAT STOP THE SUDDEN ACCELERATION IS TO 1. APPLY THE BRAKES, 2. PUT THE GEAR SELECTOR INTO NEUTRAL, OR 3. TAP THE 'OFF' POSITION ON THE CRUISE CONTROL LEVER. CRUISE CONTROL HAS NEVER BEEN UTILIZED WHEN THE VEHICLE HAS EXPERIENCED THIS UNINTENDED ACCELERATION. THERE ARE NO FLOOR MATS IN THE VEHICLE THAT COULD IMPEDE THE FUNCTIONING OF THE ACCELERATOR. THIS VEHICLE HAS BEEN TAKEN TO THE DEALER FOR SERVICE ON MULTIPLE OCCASIONS. A TECH WORKING ON THE VEHICLE STATED THAT HE BELIEVED IT WAS A CRUISE CONTROL SENSOR, BUT THE SHOP FOREMAN DETERMINED THERE WAS NOTHING WRONG. BMW OF NORTH AMERICA INSPECTED THE CAR AND HAVE STATED THAT 'THEY WILL STAND BY THEIR PRODUCT AND THAT NO DEFECT EXISTS.' I HAVE PROVIDED VIDEO DOCUMENTATION OF THIS ISSUE TO BMW. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
MY BATTERY IS IN GOOD CONDITION BUT I CAN'T START THE ENGINE.-700KM OIL SERVICE WARNING LIGHT DISPLAY ON MY DASH.FUEL PUMP IS WORKING.THEM OPEN THE KEY LIKE THAT SOUND GAP GAP IS COME OUT...PLS HELP ME...
Too few reports in this category for a page of its own — they appear in the full complaint list.
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
THE CONVERTIBLE TOP ON THE 2006 Z4 BMW HAS A MECHANISM THAT RAISES AND LOWERS THAT FAILS. IT'S LOCATION IS SUCH THAT IT IS EXPOSED TO THE ELEMENTS. WHEN I BOUGHT MY CAR (USED)I WENT TO A BMW MECHANIC THAT TOLD ME THAT IF I DID HAVE HIM FIX IT IT WOULD HAPPEN AGAIN. TALKING TO OTHER BMW MECHANICS I GOT THE SAME INFO.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Tires & wheels
Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.
From owner reports, verbatim
HI, MY DESCRIPTION IS TOO LONG , I WILL EMAIL IT SEPARATELY TO NHTSA. *TR THE CONSUMER STATED THE VEHICLE HAD RUN FLAT TIRES AND THE VEHICLE ALSO HAD A TIRE PRESSURE MONITORING SYSTEM. WHILE DRIVING DOWN THE HIGHWAY, ONE OF THE TIRES SUDDENLY COLLAPSED AND SHREDDED. BECAUSE THE TIRES WERE RUN FLAT, THE CONSUMER STATED HE SHOULD HAVE BEEN ABLE TO DRIVE 50 MILES AFTER LOOSING PRESSURE, YET IT GAVE WAY COMPLETELY IN AN INSTANT. EVEN AFTER THE BLOWOUT, THE TPMS DID NOT INDICATED THAT THE TIRE WAS LOW EVEN AFTER THE TIRE WAS COMPLETELY OFF THE RIM WITH ZERO PRESSURE. IT WAS LATER CONFIRMED THAT THERE WAS A NAIL IN THE BLOWN TIRE PROVING THAT IT HAD BEEN LOOSING AIR FOR SOME TIME AND WAS DRIVEN ANYWAY DUE TO THE TPMS NOT WORKING. UPDATED 04/04/08
Too few reports in this category for a page of its own — they appear in the full complaint list.
Transmission
Reports naming the automatic or manual transmission, including shifting behaviour, shudder, slipping and transmission control modules.
From owner reports, verbatim
THIS REPORT CONCERNS A SAFETY ISSUE WITH A 2006 BMW Z4 WITH A 3.0 ENGINE AND AUTOMATIC TRANSMISSION. THE VEHICLE HAS AN INTERMITTENT PROBLEM THAT BEGAN EARLIER THIS YEAR. THE VEHICLE WILL BEGIN ACCELERATING WITHOUT DEPRESSING THE ACCELERATOR AND WILL SOMETIMES MAINTAIN A CONSTANT SPEED WHEN THE FOOT IS TAKEN OFF THE ACCELERATOR. IT WILL ACCELERATE WELL PAST 100MPH WITHOUT STOPPING. THE THREE WAYS THAT STOP THE SUDDEN ACCELERATION IS TO 1. APPLY THE BRAKES, 2. PUT THE GEAR SELECTOR INTO NEUTRAL, OR 3. TAP THE 'OFF' POSITION ON THE CRUISE CONTROL LEVER. CRUISE CONTROL HAS NEVER BEEN UTILIZED WHEN THE VEHICLE HAS EXPERIENCED THIS UNINTENDED ACCELERATION. THERE ARE NO FLOOR MATS IN THE VEHICLE THAT COULD IMPEDE THE FUNCTIONING OF THE ACCELERATOR. THIS VEHICLE HAS BEEN TAKEN TO THE DEALER FOR SERVICE ON MULTIPLE OCCASIONS. A TECH WORKING ON THE VEHICLE STATED THAT HE BELIEVED IT WAS A CRUISE CONTROL SENSOR, BUT THE SHOP FOREMAN DETERMINED THERE WAS NOTHING WRONG. BMW OF NORTH AMERICA INSPECTED THE CAR AND HAVE STATED THAT 'THEY WILL STAND BY THEIR PRODUCT AND THAT NO DEFECT EXISTS.' I HAVE PROVIDED VIDEO DOCUMENTATION OF THIS ISSUE TO BMW. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
DRIVER'S SIDE MIRROR FELL OF MOUNT. THERE WAS NO ACCIDENT OR DAMAGE TO THE MIRROR MOUNT. I HAVE CHECKED BMW WEBSITE AND FOUND THAT IT IS DUE TO POOR GLUE/GLUING. THIS DEFECT CAN CAUSE ACCIDENTS DUE TO FLYING GLASS, AND IMPAIR DRIVER'S REAR VIEW. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .