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Bmw Z4 - 2005

299.6 faults per 100 tests
Year average for all cars of 2005 is 377.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Bmw Z4, model year 2005. Sample size: 2,399 cars, 5,674 tests and 17,002 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,399 cars

The 2005 BMW Z4 has an overall defect rate of 300 per 100 vehicles, which is notably lower than the yearly average of 376 per 100, presenting a reduction of 20%. This model demonstrates excellent performance in categories such as steering, where it has a significantly lower defect rate compared to the average. However, it shows a higher incidence of defects in the "Other" category, exceeding the average by 38%. Additionally, the defect rates increase with mileage, with vehicles over 124,000 miles showing the highest rate at 488 per 100. Overall, the Z4 stands out for its reliability in several key areas, despite some challenges in specific defect types.

Cars by mileage segment

Total: 2,399 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

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Categories

Brakes
▼ 18.0% worse
187.0 faults / 100 tests
Year avg: 158.5 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
  • Brake pipe damaged or excessively corroded
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
Steering
▲ 82.1% better
4.0 faults / 100 tests
Year avg: 22.4 / 100 tests
  • 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.
  • A steering ball joint: with excessive wear or free play
  • Free play in the steering, measured at the rim of the steering wheel is: excessive
  • Electronic power assistance not working
Visibility
▲ 36.6% better
18.0 faults / 100 tests
Year avg: 28.4 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
  • Obligatory mirror or device: slightly damaged or loose
  • Wiper blade: missing or obviously not clearing the windscreen
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 43.8% better
61.9 faults / 100 tests
Year avg: 110.1 / 100 tests
  • 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
  • Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
  • Lamp: multiple light source up to a half not functioning
Wheels & Suspension
▲ 24.1% better
238.4 faults / 100 tests
Year avg: 314.1 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A suspension component: excessively damaged or corroded
  • A suspension pin, bush, joint or bearing: excessively worn
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A shock absorber damaged … or showing signs of severe leakage
Body/Structure
▲ 79.8% better
12.4 faults / 100 tests
Year avg: 61.5 / 100 tests
  • Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
  • Fuel system: leaking, or missing or ineffective filler cap
  • Exhaust system has a major leak or is insecure
  • A door will not open using the relevant control or close properly
  • Exhaust system has a major leak or is insecure
Equipment
▲ 5.4% better
12.2 faults / 100 tests
Year avg: 12.9 / 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
▼ 40.0% worse
65.4 faults / 100 tests
Year avg: 46.7 / 100 tests
  • Engine MIL inoperative or indicating a malfunction
  • Emissions levels exceed the manufacturer’s specified limits
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Emissions levels exceed default limits
  • Lambda coefficient outside the default limits or the range specified by the manufacturer

Fault rate by mileage segment

Model    Year average
0 520 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: 2,253
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 1,369
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 1,347
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 1,187
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 839
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 754
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 659
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 522
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 407
Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
ADVISORY
Occurrences: 385

Serious faults (Top 10)

A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 342
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 303
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 195
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 164
Emissions levels exceed default limits
FAIL
Occurrences: 123
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 118
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 115
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 114
Emissions levels exceed the manufacturer’s specified limits
FAIL
Occurrences: 112
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 107