Most common 2003 BMW Z4 problems
Share of the 414 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
BMW Z4 complaints by model year
Best Z4 years: 2012, 2015, 2021. Years to avoid: 2011, 2003, 2004, 2005, 2006. Compare all years →
2003 BMW Z4 recalls (4)
Air bags
On certain passenger vehicles, incompatible electronic air bag system processors May have been installed.
Remedy: Dealers will inspect and, if necessary, replace the air bag system processors. The recall began June 11, 2004. Owners should contact BMW at 1-800-831-1117.
Fuel system, gasoline › Delivery › Fuel pump
On certain passenger vehicles, under certain environmental conditions, a vapor lock in the fuel pump could occur causing the engine to stall. If this were to happen, the engine would not be able to be restarted for approximately 15 to 20 minutes.
Remedy: Dealers will install a resistor in the electrical line powering the fuel pump in order to prevent an occurrence of vapor lock. The recall began May 11, 2004. Owners should contact BMW at 1-800-831-1117.
Tires
On certain vehicles equipped with 18" tires, it is possible that the tire has been damaged during the mounting process to the rim.
Remedy: Dealers will unseat the tire from its rim, inspect for any damage, and then reseat the tire to its rim. If inspection reveals that a front tire has incurred damage during the mounting process, it will be replaced.
Seat belts › Front › Buckle assembly
On certain passenger vehicles, the connection of the safety belt buckle to the steel rope of the tensioner does not meet BMW specifications. In severe frontal crashes, this connection can detach.
Remedy: Dealers will inspect both front safety belt tensioner and buckle assemblies, and if necessary, replace these parts. Owner notification began March 19, 2003.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2003 BMW Z4:
Sticky Steering
ODI has evaluated the sticky steering condition, which included reviews of complaints and warranty claims, interviews and surveys of owners of complaint vehicles, road tests of complaint vehicles, and a review of BMW's engineering and test data.ODI found the sticky steering condition does not result in a significant steering effort, thus the impact on the driver's ability to control the vehicle does not appear to be…
What 2003 BMW Z4 owners say
Steering all 342 →
The contact owns a 2003 BMW Z4. The contact stated while driving at various speeds in hot weather, the steering wheel became difficult to turn and would also jerk the vehicle into the next lane. The contact stated no warning light was illuminated. The contact was able to drive to the residence. The contact took the vehicle to the local dealer, where it was diagnosed with needing the battery to be replaced. The dealer replaced the battery however, the failure recurred. The manufacturer had been informed of the failure. The failure mileage was approximately 24,000.
My girlfriend, [redacted] , purchased a used 2003 BMW z4 2.5i. It is pristine with 47K original miles. Always maintained, garaged and never driven in foul weather. I, [redacted] , drove it home for her and noticed the steering to be "sticky". This showed on the highway traveling at 65 MPH. It was very unsettling to feel the car want to track in a direction that i could not control. I used "more force" to pull the steering wheel to get tracking correctly and stay in my travel lane. Lucking I did not overcorrect and lose control or cause and accident. Once it happened it continued to happen the balance of the drive on the highway and back roads. I've owned and driven many different makes and models of vehicles from Dodge, Renault, Toyota, GMC, Chrysler, Volvo, Geo, etc. and never has "steering" been an issue. …
Air bags all 31 →
Takata recall. 2003 BMW Z4 air bags did not deploy nor did seat belts lock when car hit a tracter trailer who suddenly stopped short on the highway. BMW was moving at approx 80 MPH when driver hit breaks upon seeing trailer stop short.
On July 2018 BMW issued an important limited warranty information notice related to this vehicle. BMW would cover repairs to the front passenger seat occupancy for the SRS/air bag system. Unfortunately this warranty repair will not cover my vehicle because the 15 year period does not include my vehicle that was put into service in January 2003. I believe that BMW should cover any 2003 BMW Z4 rather than cutting off those made in the prior 6 months. BMW refuses to cover. The other concern I have relates to the servo motor/electronic steering control unit. Recently this failed and I note that other bmws have had this problem too. I believe your agency should determine whether or not this warrants a recall too. It is very dangerous to be driving and the power steering ceases to function. People will be killed. …
Electrical system
Tl* the contact owns a 2003 BMW Z4. The contact stated that while driving at 20 MPH, various warning lights illuminated on the instrument panel and the vehicle began to accelerate independently without the accelerator pedal being depressed. The vehicle began to veer side to side and as a result, an oncoming vehicle on the left lane crashed into the contact's rear driver side. The air bags failed to deploy. A police report was filed. The contact did not sustain any injuries. The vehicle was towed to a junkyard. The manufacturer was not notified of the failure. The failure mileage was 143,000. The VIN was not available.
The central locking system does not work correctly. It operates the glove box, passenger and driver doors as well as gas cap door. It does not respond properly to fob or by key. At times all locks are frozen to the point where you can not open to get in or gas. Right now passenger door has been locked for 30+ days. Cannot open at all. Took to a mechanic who ordered a new actuater from BMW dealer, first one did not work. Second one installed and the problem is not solved. ($240.00). Mechanic tells me that something is burning and I must take to dealership. I can smell the burning and I am afraid and will not drive. Looked up on internet, there are 100s of consumers with the same issue. This car only has 71,000 miles on it.
2003 BMW Z4 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 6-cyl | 5-speed automatic | RWD | 18 / 26 / 21 |
| 2.5L 6-cyl | 5-speed manual | RWD | 18 / 26 / 21 |
| 3.0L 6-cyl | 6-speed manual | RWD | 18 / 27 / 21 |
| 3.0L 6-cyl | 6-speed automatic | RWD | 18 / 27 / 21 |
| 2.5L 6-cyl | 6-speed automatic | RWD | 18 / 27 / 21 |
| 3.0L 6-cyl | 5-speed automatic | RWD | 18 / 25 / 20 |
EPA ratings. Class: Sports car.
Frequently asked questions
Is the 2003 BMW Z4 a good car?
Based on 414 owner complaints filed with NHTSA, the 2003 Z4 rates avoid: 16.3× as many complaints as a typical year of the Z4 at the same age. It is one of the Z4 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2003 BMW Z4?
The steering — 342 complaints, 83% of all complaints for this model year, most often about electric power assist system. Next are the air bags (31) and electrical system (13).
How many recalls does the 2003 BMW Z4 have?
There are 4 recalls for the 2003 BMW Z4, the most recent from May 24, 2004 (air bags). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the BMW Z4?
The best years by complaints, compared at the same age, are 2012, 2015 and 2021. Years to avoid or approach with caution: 2011, 2003, 2004, 2005 and 2006. See the full BMW Z4 years comparison.
At what mileage do 2003 BMW Z4 problems happen?
The median mileage reported in complaints is about 42,000 miles; 56% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.