BMW Z4 MOT Pass Rate & Official DVSA Failure Statistics

BMW Z4 MOT History and Failure Rates vs UK National Average

The BMW Z4 passed on its first attempt in 80.4%, and its overall record sits +2.2 percentage points above the national average for all cars. These figures come from every recorded DVSA MOT test for the BMW Z4 in the 2023–2025 data: 121,314 tests across 20 model years (2003–2023). A test still carries exactly one pass or fail verdict.

Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.

Most Common BMW Z4 MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the BMW Z4, the Lamps, reflectors and electrical equipment section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.

Shares are over the BMW Z4's recorded defect strings, merged across its year pages.

Top Recorded BMW Z4 DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the BMW Z4, each with how many of the model's 121,314 tests it was noted on.

• "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 2,745 BMW Z4 tests, 2.3% of the model's MOT record.
• "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (Minor) — noted on about 2,380 BMW Z4 tests, 2.0% of the model's MOT record.
• "Malfunction indicator lamp inoperative or indicates a malfunction" (Major) — noted on about 1,584 BMW Z4 tests, 1.3% of the model's MOT record.
• "Headlamp lens slightly defective" (Minor) — noted on about 1,494 BMW Z4 tests, 1.2% of the model's MOT record.
• "Rigid brake pipes excessively corroded" (Major) — noted on about 1,393 BMW Z4 tests, 1.1% of the model's MOT record.
• "Coil spring fractured or broken" (Major) — noted on about 1,269 BMW Z4 tests, 1.0% of the model's MOT record.

Best and Worst BMW Z4 Model Years by Pass Rate

The strongest BMW Z4 model year on record is 2023 (100.0% across 58 tests), and the weakest is 2005 (75.5%). The gap between them is 24.5 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.

BMW Z4 reliability is improving in the DVSA data — the pass rate moves about 2.1 points a year across the most recent model years shown above.

Newest model year first. Only years with at least 50 recorded tests are listed.

Pre-MOT Inspection Checklist for BMW Z4 Owners

These checks follow this BMW Z4's own most-recorded failure strings, starting with what a tester is most likely to flag on a BMW Z4.

• the windscreen — “windscreen damaged”

  Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.

• the lights — “registration plate lamp(s) inoperative in the case of multiple lamps or light sources”

  Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.

• the brake pipes — “rigid brake pipes excessively corroded”

  Brake pipes run under the car, usually in front of the rear wheels. Flaking or crusty metal is what fails; a light dusting of surface rust does not. Worth asking a garage to look while it is on a ramp.

Derived from the DVSA failure strings testers recorded for the BMW Z4. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Where the BMW Z4 is most common

Across every Z4 model year on record (2003–2023): 54,485 BMW Z4 cars tested in a recordable postcode area, across 121,304 tests. Birmingham (B) has the most, with 1,477 cars tested there. Cars are counted by the postcode area of the MOT station, so this is where they were tested, not necessarily where their owners live.

The twenty areas with the most BMW Z4 cars in the record, sorted by car count — sort the columns for a different question. Cars tested at a station whose postcode area could not be resolved are counted in the model's total but in no area, so the shares add up to slightly under 100% even across every area, and an area's cars are a subset of the model's. Pass rate is blank below 30 tests in an area, where a percentage is noise rather than a finding. How this model's pass rate varies by postcode →

Frequently Asked Questions: BMW Z4 MOT & Reliability