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BMW Z4Model year report

2003 BMW Z4 Problems

Complaints
414filed with NHTSA
Median mileage
41,575miles, 354 complaints with mileage
Recalls
4campaigns on record
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
21 mpgcombined, 2.5L 6-cyl RWD · 18 city / 26 hwy

Sources: NHTSA records for the 2003 BMW Z4 (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

What owners report

Owners of this model year most often describe steering that becomes stiff, notchy or "sticky" in warm weather, requiring extra effort and then over-correcting. Second to that, a smaller group of complaints covers air bag warning lights and passenger-side air bag status. Many steering complaints are filed well below 60,000 miles, and several mention warm climates or the car being parked in the sun.

  1. Steering

    Sticky / notchy steering, worse in hot weather

    • 267 complaints (64%)
    • median 40,000 mi at 8.6 yrs old (238 state mileage)
    • 2 mention a crash, fire or injury
    • owner-quoted repair $3,250 (median of 32 quotes)
    • filed 2004–2026

    Owners describe the steering wheel sticking around center or in a slight turn, then releasing suddenly when extra force is applied, which leads to over-correction and swerving. Complaints say it is most noticeable at highway speed and in hot weather or after the car has sat in the sun. Several report dealers replaced the steering column or power steering components, while others say the dealer could not reproduce the problem or told them the factory had no fix. Reported from very low mileage up to around 110,000 miles, most often in warm weather or after the car was parked in direct sun.

    1 related service bulletin

    What to check: Test drive on a warm day or after the car has sat in the sun, and try small corrections at highway speed to feel for sticking or notching near center. Ask whether the steering column or power steering unit has been replaced and keep any repair paperwork.

    2 excerpts from owner complaints in NHTSA records

    “While driving on the interstate and in the city, my Bmw Z4's steering wheel gets stuck, pulls to the left & right and needs hard force to release it. I've almost wrecked several times because of this! I'm afraid to drive the car because it's too dangerous. After much research on this issue, I've found out that thousands of Bmw Z4 owners have the exact same problem.”

    NHTSA complaint #10786198, filed 2015-10, 78,000 miles

    “My Bmw Z4 2003 suddenly has a steering problem where the wheel sticks in place and catches before allowing me to steer properly. Bmw dealer was notified of the problem and asked that I not drive the car but that I bring it in for a look. Obviously they know it is dangerous for me to drive!!!”

    NHTSA complaint #10346097, filed 2010-07, 69,000 miles
  2. Air bags

    Air bag warning light and passenger air bag status

    • 32 complaints (8%)
    • median 60,000 mi at 9.1 yrs old (26 state mileage)
    • 2 mention a crash, fire or injury
    • owner-quoted repair $1,400 (median of 5 quotes)
    • filed 2005–2020

    Complaints describe the air bag warning lamp lighting up, sometimes intermittently, or the passenger air bag switching itself off and not returning to automatic. In some cases the dealer reset the system with a factory computer; others were told their vehicle was not covered by the air bag recall. One owner reported the air bags did not deploy in a collision. Mostly reported between about 12,000 and 65,000 miles, with some appearing at the time of first ownership.

    Recall 04V2470001 related service bulletin

    What to check: Check that the air bag warning and passenger air bag status lamps behave normally at startup, and ask whether the vehicle had the air bag processor campaign completed and whether the seat mat service action was done.

    2 excerpts from owner complaints in NHTSA records

    “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.”

    NHTSA complaint #11016271, filed 2017-08, 35,000 miles

    “From day one I had airbag problem for the passenger side. Air bag never worked. Bmw had recall and extended warranty for 10 years, but they don't accept responsibility steering column has problems too”

    NHTSA complaint #11290625, filed 2019-12, 24,000 miles
  3. Engine cooling

    Engine stalls or loses power while driving

    • 23 complaints (6%)
    • median 50,100 mi at 7.8 yrs old (19 state mileage)
    • filed 2003–2018

    Owners report the engine cutting out at speed with a loss of power, sometimes restarting after a wait of 15 minutes to over an hour. Some complaints link the behavior to a fuel pump vapor lock described in a recall, and at least one owner was told the vehicle was not covered. Others describe rough running or stalling that dealers could not duplicate. Reported from roughly 3,000 to 32,000 miles, sometimes on the highway at speed.

    Recall 04V1820001 related service bulletin

    What to check: Ask whether the fuel pump recall campaign was performed for this vehicle, and note any history of hard starting or stalling after the car has been parked in heat.

    2 excerpts from owner complaints in NHTSA records

    “My car stalled on the road going fifty miles an hour on university city blvd. In charlotte north carolina. I was almost rear ended by another vehicle but luckily the driver was able to avoid me. I have never been that scared in my life. This was the third time the car had broken down in nine months. The first time being may 27, 2003. The second being october 25, 2003. And the third time being january 16, 2004 (this is the time it stalled going 50 miles on the road). …”

    NHTSA complaint #10061950, filed 2004-03, 18,000 miles

    “12-31-08 my car failed to accelerate while I was traveling on the interstate between 55-65 miles pe hour. I was trapped in the middle lane but was able to cruise to the outer land but was unable to drive my car to the side of the road before the engine turned off. Tafter 10 =15 minutes my car started, and the florida state trooper assist me to the next exit. After I had to have my car towed to my home 45 miles away.... It cost me $197.00 but my extended warranty paid 70 dollars of the full cost..... …”

    NHTSA complaint #10254184, filed 2009-01, 41,000 miles

Buying note. The steering behavior is the item to evaluate carefully on a test drive, ideally in warm conditions, and to price into any purchase. Beyond that, confirm which open campaigns have been completed and check for coolant leaks and air bag lamp behavior before committing.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.

NHTSA recorded 414 consumer complaints for the 2003 BMW Z4. 354 of the complaints include a mileage, and 56% of those were filed for vehicles with under 50,000 miles; the median is 41,575 miles. Of all complaints, 5 involved a crash, 1 an injury, according to the filers. NHTSA lists 4 recall campaigns and 35 technical service bulletins for this model year.

Not compared (before 2008). Model years 2008–2023 of the same vehicle that have at least 25 complaints are compared, and a model needs at least 3 of them.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Seat belts (4), Suspension (4), Equipment (3), Brakes (2), Exterior lighting (2), Tires (2), Visibility (wipers, defrost, mirrors) (2), Electronic stability control (1), Engine (1).

Example complaints

Steering: “I just purchased Z4. Did not notice any problem during test ride. On my way home during purchase steering became an issue. The car would be driving fine then what I would a dead spot would appear. The steering wheel will suddenly shift left or right what seems a few inches. This causes driver (me) to compensate to avoid going in ditch or crossing a lane or getting into an accident. This happened many times on my 70-mile trip home.”

NHTSA complaint #11407451, filed 2021-04, 93,000 miles

Air bags: “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. …”

NHTSA complaint #11128326, filed 2018-09, 80,500 miles

Electrical system: “Passenger door lock will not unlock with the key fob or the interior switch. All other locks respond appropriately. The door will open manually with the interior handle. I replaced the lock actuator with no improvement. I am now trying to replace the electrical relay. The date below is approximate. I am the original purchaser. I have not been happy with Bmw service department.”

NHTSA complaint #10783792, filed 2015-10, 30,000 miles

Engine cooling: “The power steering assist has failed on the car making it very difficult to steer. Luckily it failed while on a straight part of an interstate as my daughter was driving the car and this severely frightened her. She did not overreact and we took appropriate measures to get the vehicle home. Online research indicates that this issue was being investigated by NHTSA in 2010 but can not find any indication that an actual recall is in place. This is a very dangerous thing to happen, especially in a state with a lot of winding roads (tennessee). …”

NHTSA complaint #10445000, filed 2012-01, 81,000 miles

Mileage when problems were reported

56% of the 354 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 24,000 and 68,250 miles.

11%0–1016%10–2530%25–5025%50–7511%75–1006%100–1501%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (354 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 41,575 miles.

Complaints by year filed

Trend: falling. Complaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

’05’0867’11’14’17’20’23’26
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2003 BMW Z4. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
Z4 · coupe not rated4 / 4———

Ratings before the 2011 model year come from an older, less demanding test and are not comparable with ratings for 2011 and later.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2003 BMW Z4 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Z4 Roadster RWD2.5L 6-cyl5-speed automatic182621$3,900
Z4 Roadster RWD2.5L 6-cyl5-speed manual182621$3,900
Z4 Roadster RWD2.5L 6-cyl6-speed automatic182721$3,900
Z4 Roadster RWD3.0L 6-cyl6-speed manual182721$3,900
Z4 Roadster RWD3.0L 6-cyl6-speed automatic182721$3,900
Z4 Roadster RWD3.0L 6-cyl5-speed automatic182520$4,100

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2003 BMW Z4 → · Check a VIN at nhtsa.gov/recalls

NHTSA investigations

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 35 on record; the latest 10 are shown.

See all 35 bulletins →

Other model years of the BMW Z4

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
202053,0006—27—Not enough data
201952006—28—Not enough data
2015511,2121—26—Not enough data
2014726,0003—21—Not enough data
2013738,6503—21—Not enough data
2012565,9004—21—Not enough data
20114636,0006—21Not compared (fewer than 3 comparable model years)Rising
2010108,0665—22—Not enough data
20092217,5004—22—Falling
20081960,0002—21—Falling
20073347,0002—21Not compared (before 2008)Falling
20069154,0002—21Not compared (before 2008)Falling
200519146,5000—21Not compared (before 2008)Falling
200441147,0001—21Not compared (before 2008)Falling
200341441,5754—21Not compared (before 2008)Falling

All BMW Z4 model years · Best and worst years by complaints

Frequently asked questions

What are the most common problems with the 2003 BMW Z4?

Owners of this model year most often describe steering that becomes stiff, notchy or "sticky" in warm weather, requiring extra effort and then over-correcting. The issues reported most often: Sticky / notchy steering, worse in hot weather; Air bag warning light and passenger air bag status; Engine stalls or loses power while driving.

How many NHTSA complaints does the 2003 BMW Z4 have?

NHTSA recorded 414 consumer complaints for the 2003 BMW Z4 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2003 BMW Z4 is reported most often?

Steering is named most often, in 342 complaints (83% of the total), followed by air bags with 31.

Has the 2003 BMW Z4 been recalled?

NHTSA lists 4 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2003 BMW Z4 get?

The EPA rates the 2003 BMW Z4 (Z4 Roadster, 2.5L 6-cyl) at 21 mpg combined, 18 city and 26 highway, with an estimated annual fuel cost of $3,900 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2003 BMW Z4 reported?

Among the 354 complaints that include a mileage, the median is 41,575 miles and the middle half falls between 24,000 and 68,250 miles; 56% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.