hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
48,650 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 BMW Z4 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2003 BMW Z4:

Unsubscribe any time. We don't sell/share your email.

2003 BMW Z4 Owner Comments

problem #4

Jan 032012

Z4 6-cyl

  • 81,000 miles


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). I purchased the car used last year and also had a water pump failure that resulted in a blown engine. I wish this issue had been investigated also as I understand that it is a common failure with this particular engine. There is also a problem with the speedometer and fuel gauges reading incorrectly. I read that one owner was contacted by BMW North America after they filed a complaint regarding the power steering with NHTSA and BMW voluntarily fixed the problem for the owner. I hope I have the same luck after posting this complaint. Thank you.

- Greenbrier, TN, USA

problem #3

Dec 182008


  • 41,000 miles
The contact owns a 2003 BMW Z4. While driving 60mph his vehicle shut off in traffic. The road conditions were not a factor. The vehicle was accelerating at the time the engine shut off. He was able to maintain control of the vehicle but there was no power steering and the brakes failed. It became was very difficult to steer the vehicle. There were no warnings prior to the failure. He was able to operate the vehicle normally after 20 minutes. The following day when the vehicle started there was a bubbling noise in the engine area that lasted for approximately 2 minutes. No problem. The dealer and manufacturer confirmed that the vehicle was not a part of the recall. He was also advised that he would have to pay $152 for a diagnosic check. The failure mileage was 41,000.

- Miami, FL, USA

problem #2

Sep 072007

Z4 6-cyl

  • Manual transmission
  • 48,000 miles
BMW Z4 engine failure.

- Denham Springs, LA, USA

problem #1

Sep 052006

Z4 6-cyl

  • Automatic transmission
  • 24,599 miles
: the contact stated while driving 55 mph on the highway, the engine stalled without warning and there was a loss of all vehicle power. After an extended period of time, the engine restarted. The vehicle was inspected by a dealer numerous times, but was unable to duplicate the problem. The manufacturer was alerted.

- San Antonio, TX, USA

Not what you are looking for?