Reliability, what owners report, and what it costs to keep.
AVOIR's read: running costs are the problem rather than the car itself.
Owners have filed 46 complaints with NHTSA about the 2011 BMW Z4 sDrive30i, and it carries no recalls. These are owner allegations rather than confirmed defects, but the pattern of what people complain about is the most useful signal a used buyer has.
| Area | Complaints | Share |
|---|---|---|
| Steering | 10 | 22% |
| Engine | 7 | 15% |
| Engine and engine cooling | 7 | 15% |
| Wheels | 6 | 13% |
| Service brakes | 3 | 7% |
| Steering | 2 | 4% |
| Fuel/propulsion system | 1 | 2% |
| Engine | 1 | 2% |
| Steering | 1 | 2% |
| Unknown or other | 1 | 2% |
Verbatim from NHTSA complaint records, trimmed for length.
ON 3 APRIL 2026 I WAS DRIVING MY 2011 BMW Z4 SDRIVE 30I E89 N52K (MANUAL TRANSMISSION) THAT HAS 31,000 MILES ON IT, SUDDENLY A STEERING ASSISTANCE MALFUNCTION TROUBLE LIGHT APPEARED AND I LOST ALL ELECTRONIC POWER STEER
NHTSA complaint: Steering
Electrical power steering system failed, warning light came on. Vehicle suddenly became very difficult to impossible to steer. Failed to negotiate a turn and nearly hit a tree. I have an appointment set with an independe
NHTSA complaint: Steering
Steering assist failed almost resulting in head on collision. Failure is serious and likely to cause fatalities
NHTSA complaint: Steering
Power steering is intermittent where assist goes from working to not working changing the effort required to turn the wheel. When power assist goes off it is difficult to steer the car.
NHTSA complaint: Steering
October, 9, 2024 BMW USA Customer Relations, Recall Services Ms. Ikevia, Thank you following up. My 2021 claim regarding the 2011 BMW Z4 Vanos Bolts recall has been pending since April, 2021. My Z4 almost destroyed i
NHTSA complaint: Engine
Electric power assist intermittently fails without warning making steering impossible. Similar to 2012 z4 recall
NHTSA complaint: Steering
I have written to you previously to advise of repeated engine issues with my vehicle, a 2011 BMW Z4. I also included invoices of work that was done over time to correct a likely Engineering flaw that caused excessive fue
NHTSA complaint: Engine
The contact owns a 2011 BMW Z4. The contact stated while driving at 55 MPH, the vehicle stalled. The vehicle was difficult to restart. The check engine warning light was illuminated. The contact received notification of
NHTSA complaint: Engine and engine cooling
| Reliability raw | 78 | good |
|---|---|---|
| Longevity est. | 76 | good |
| Maintenance | 59 | average |
| Depreciation | 52 | average |
| Performance | 59 | average |
| Efficiency | 39 | below average |
Percentile ranks against other sports & two-seaters in the catalog.
What stands behind each score for this car:
Owners have filed 46 complaints with NHTSA for this model-year, and steering is the most reported area with 10 of them (22%). No recalls are on record for it.
AVOIR scores its reliability 78/100 (good) from NHTSA recall campaigns and complaint density. That figure is a raw complaint count, not yet adjusted for sales volume, so a high-volume model scores worse than it deserves.
AVOIR scores its longevity 76/100, but that figure is an estimate built from the powertrain and the brand's record, not a measurement. A 2011 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.
AVOIR's read: skip unless cheap, because running costs are the problem rather than the car itself. Its overall ownership score is 64/100. Condition, mileage and service history still matter more than any score, so get a pre-purchase inspection on the specific car.
Sources: NHTSA recalls and complaints, EPA fuel economy, IIHS awards, and live market listings. A score describes a model-year, not the individual car in front of you. Get a pre-purchase inspection.