BMW Z4 reliability, MOT pass rate and rarity

Time Period & Model

Time period snapshot: Last 5 years

Manufacturer: BMW

Model: Z4

Model reliability rank

MOT-based rank from 216,886 selected-period tests.

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Overall MOT pass rate

80.8%

Share of this model's 216,886 selected-period MOT tests that pass.

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Efficiency, emissions & tax

Average MPG

39.8 mpg

CO2 emission

164 g/km

Euro emissions

Euro 6

Tax cost

£240/yr

Vehicle list price over £40,000?NoYes

Average vehicle miles

73,700

Moderate average mileage in the current pool.

Life expectancy miles

81,573

Lower mature-fleet mileage expectation.

Average vehicle age

15.0

Comfortable mid-life age pattern.

Vehicles represented

33,041

33,040 valid MOT, 1 under 3 years.

Tests analysed

216,886

216,886 MOT tests in the selected period.

Rarity ranking

Based on Make & Model

Scarce

33,041On the road

Insight summary

BMW Z4 is a scarce model in this snapshot, with 33,041 represented vehicles and 0.08% of the active UK pool tracked by AutoRank. For the last 5 years, it has a pass rate of 80.8% from 216,886 MOT tests, with a reliability score of 64. The current pool shows an average of 73,700 miles and an average age of 15.0 years, while mature-fleet mileage is estimated at 81,573 miles. Petrol leads the fuel split, followed by diesel, and the most frequent defect themes are engine warning light, windscreen damage and lighting. The practical read is that the BMW Z4 looks a little better than average, but still rewards careful checks on mileage and maintenance.

Fuel type breakdown (by model)

Fuel	Vehicles
PETROL	33,026
DIESEL	14
LPG	1

Euro NCAP Safety

NCAP rating

5 / 5

Adult

97%

Children

87%

Pedestrian

91%

Safety systems

76%

Top 25 most common defects (by model)

Defect	Count
Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))	3,249
Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))	2,668
Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))	2,520
Offside Rear Coil spring fractured or broken (5.3.1 (b) (i))	1,725
Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))	1,613
Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i))	1,419
Windscreen washer provides insufficient washer liquid (3.5 (a))	1,322
Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))	1,195
Nearside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))	1,177
Offside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))	1,175
Parking brake efficiency below requirements (1.4.2 (a) (i))	1,122
Anti-lock braking system warning lamp indicates an ABS fault (1.6 (b))	1,058
Nearside Rear Tyre has ply or cords exposed (5.2.3 (d) (ii))	1,056
Offside Headlamp lens slightly defective (4.1.1 (b) (i))	902
Nearside Headlamp lens slightly defective (4.1.1 (b) (i))	897
Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))	895
Nearside Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))	895
Nearside Front Shock absorbers has a serious fluid leak (5.3.2 (b))	833
Nearside Rear Brake pipe excessively corroded (1.1.11 (c))	833
Nearside Front Tyre has ply or cords exposed (5.2.3 (d) (ii))	799
Electronic stability control warning lamp indicates a fault (7.12 (e))	774
Nearside Rear Road wheel fractured (5.2.2 (a))	771
Offside Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))	769
Offside Rear Brake pipe excessively corroded (1.1.11 (c))	714
Offside Front Shock absorbers has a serious fluid leak (5.3.2 (b))	712

All 25 defects ranked by recorded countShowing 31,093 defects across this top 25 set

Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))

3,249

Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))

2,668

Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))

2,520

Offside Rear Coil spring fractured or broken (5.3.1 (b) (i))

1,725

Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))

1,613

Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i))

1,419

Windscreen washer provides insufficient washer liquid (3.5 (a))

1,322

Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))

1,195

Nearside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

1,177

Offside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

1,175

Parking brake efficiency below requirements (1.4.2 (a) (i))

1,122

Anti-lock braking system warning lamp indicates an ABS fault (1.6 (b))

1,058

Nearside Rear Tyre has ply or cords exposed (5.2.3 (d) (ii))

1,056

Offside Headlamp lens slightly defective (4.1.1 (b) (i))

902

Nearside Headlamp lens slightly defective (4.1.1 (b) (i))

897

Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))

895

Nearside Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))

895

Nearside Front Shock absorbers has a serious fluid leak (5.3.2 (b))

833

Nearside Rear Brake pipe excessively corroded (1.1.11 (c))

833

Nearside Front Tyre has ply or cords exposed (5.2.3 (d) (ii))

799

Electronic stability control warning lamp indicates a fault (7.12 (e))

774

Nearside Rear Road wheel fractured (5.2.2 (a))

771

Offside Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))

769

Offside Rear Brake pipe excessively corroded (1.1.11 (c))

714

Offside Front Shock absorbers has a serious fluid leak (5.3.2 (b))

712

BMW Z4 reliability and MOT data