Skip to main content

Bmw Z4 - 2003

282.3 faults per 100 tests
Year average for all cars of 2003 is 380.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Bmw Z4, model year 2003. Sample size: 2,925 cars, 6,664 tests and 18,810 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,925 cars

The 2003 BMW Z4 has an overall defect rate of 282 per 100 cars, which is 25% lower than the average for vehicles of the same year, indicating a solid performance in terms of reliability. Notably, the Z4 excels in categories such as steering, visibility, and body structure, showing significantly fewer defects compared to other models. It also performs better than average in lights and electrics, although it has a higher defect rate in that category overall. Mileage trends reveal that as the vehicle ages, the defect rate increases, with the highest rate observed in those with over 124,000 miles. Overall, this model demonstrates strong reliability and lower defects in key areas compared to its peers.

Cars by mileage segment

Total: 2,925 cars

More model years for Bmw Z4

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2019 2020 2021 2022

Other models from Bmw

Bmw 114 Bmw 116 Bmw 118 Bmw 120 Bmw 123 Bmw 125 Bmw 216 Bmw 218 Bmw 220 Bmw 316 Bmw 318 Bmw 320 Bmw 330 Bmw 335 Bmw 418 Bmw 420 Bmw 428 Bmw 430 Bmw 435 Bmw 440 Bmw 518 Bmw 520 Bmw 523 Bmw 525 Bmw 528 Bmw 530 Bmw 535 Bmw 630 Bmw 640 Bmw 645 Bmw 650 Bmw 728 Bmw 730 Bmw 740 Bmw 840 Bmw ALPINA Bmw I3 Bmw I4 Bmw IX3 Bmw M2 Bmw M3 Bmw M340D Bmw M4 Bmw M5 Bmw M6 Bmw X1 Bmw X2 Bmw X3 Bmw X4 Bmw X5 Bmw X6 Bmw X7 Bmw Z3 Bmw Z4

Categories

Brakes
▼ 8.8% worse
184.2 faults / 100 tests
Year avg: 169.3 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
  • Brake hose ferrules: excessively corroded
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
Steering
▲ 84.5% better
3.9 faults / 100 tests
Year avg: 25.2 / 100 tests
  • A steering ball joint: with excessive wear or free play
  • A steering ball joint: with excessive wear or free play
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • Free play in the steering, measured at the rim of the steering wheel is: excessive
Visibility
▲ 30.2% better
20.8 faults / 100 tests
Year avg: 29.8 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: missing or obviously not clearing the windscreen
  • Wiper blade: defective
Lights & Electrics
▲ 46.1% better
55.4 faults / 100 tests
Year avg: 102.8 / 100 tests
  • Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
  • The aim of a headlamp is not within limits laid down in the requirements
  • Headlamp reflector or lens: slightly defective
  • A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
  • Beam image obviously incorrect
Wheels & Suspension
▲ 20.7% better
239.6 faults / 100 tests
Year avg: 302.1 / 100 tests
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension component: excessively damaged or corroded
  • A spring: or spring component fractured or seriously weakened
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 83.1% better
11.0 faults / 100 tests
Year avg: 65.2 / 100 tests
  • Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
  • A door will not open using the relevant control or close properly
  • Exhaust system has a major leak or is insecure
  • Fuel system: leaking, or missing or ineffective filler cap
  • A transmission shaft constant velocity joint boot: severely deteriorated
Equipment
▲ 11.0% better
12.1 faults / 100 tests
Year avg: 13.6 / 100 tests
  • ESC MIL indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • Audible warning:
Other
▲ 28.8% better
37.5 faults / 100 tests
Year avg: 52.7 / 100 tests
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • Engine MIL inoperative or indicating a malfunction
  • Engine MIL inoperative or indicating a malfunction
  • Exhaust noise levels in excess of those permitted

Fault rate by mileage segment

Model    Year average
0 538 0–31,000 mi 31,000–62,000 62,000–93,000 93,000–124,000 124,000+
* Metric: faults per 100 tests.

Most common faults (Top 10)

Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 2,682
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 1,727
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 1,467
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 1,202
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 1,009
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 939
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 773
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 576
Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
ADVISORY
Occurrences: 445
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 363

Serious faults (Top 10)

A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 340
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 270
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 218
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 214
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 125
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 121
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 112
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 99
Beam image obviously incorrect
FAIL
Occurrences: 99
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 96