Is the BMW X4 reliable?

On MOT evidence the BMW X4 is well above average. It passes 84.7% of tests once age and mileage are accounted for, against a national average of 72.3%. That figure covers 60% of the national age and mileage range, which is enough to quote but not to rank. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.

What is the most common MOT failure on a BMW X4?

The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 18.5% of failed BMW X4 tests. Because one failed test can list several items, these shares do not add up to 100%.

What do testers most often warn about on a BMW X4?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 25.4% of all BMW X4 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a BMW X4 usually have at its MOT?

The average odometer reading recorded at test is 62,706 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Does a BMW X4 get harder to pass as it ages?

Yes. At 3 to 5 years old, 89.0% of BMW X4 tests pass. By 9 to 11 years, that falls to 79.6%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.

Are most BMW X4 models petrol or diesel?

Of the BMW X4 cars tested, 76% are diesel, 17% are diesel hybrid, 6% are petrol. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

BMW X4 MOT pass rate & common failures

From 17,927 recorded MOT tests of the BMW X4, published by DVSA.

Data updated 29 July 2026

Quick answer

The BMW X4 passes 84.7% of MOT tests once results are adjusted for the age and mileage of the cars tested, against a national average of 72.3%. That is well above average. Based on 17,927 tests. Its most commonly recorded failure is tyre tread depth not in accordance with the requirements, which appears in 18.5% of failed tests. Cars of this model average 62,706 miles on the odometer when tested.

At a glance

Pass rate, adjusted for age and mileage

84.7%national average72.3%unadjusted84.6%range covered60%

The X4 is 12.4 percentage points above the national pass rate once age and mileage are accounted for, which is well above average. The unadjusted figure is 84.6%; the difference is what the age and mileage of this model’s fleet was hiding.

DVSA recorded wording

Most common failure items

Share of failed BMW X4 tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.Tyre tread depth not in accordance with the requirements18.5%
436 occurrencesTyre worn close to the legal limit explained
2.A spring or spring component fractured or seriously weakened18.0%
424 occurrencesRoad spring broken or fractured explained
3.A tyre seriously damaged16.6%
391 occurrencesTyre damaged or deteriorated explained
4.Wiper blade missing or obviously not clearing the windscreen14.9%
351 occurrencesWiper or washer not working properly explained
5.A tyre cords visible or damaged10.8%
255 occurrencesTyre ply or cord exposed, or the casing separating explained
6.A brake lining or pad worn below 1.5mm8.4%
199 occurrencesBrake drum or shoe worn or contaminated explained
7.Engine MIL illuminated indicating a malfunction5.9%
139 occurrencesEngine management light on, or not working explained
8.Windscreen washers not working or not providing sufficient fluid to clear the windscreen4.6%
108 occurrencesWiper or washer not working properly explained
9.A tyre seriously damaged4.5%
107 occurrencesTyre damaged or deteriorated explained
10.Number plate does not conform to the specified requirements4.2%
98 occurrencesRegistration plate missing, insecure or illegible explained

Warnings without a failure

Most common advisories

Share of all BMW X4 tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Tyre tread depth not in accordance with the requirements25.4%
4,558 testsTyre worn close to the legal limit explained
2.A brake lining or pad worn below 1.5mm7.8%
1,397 testsBrake drum or shoe worn or contaminated explained
3.Brake disc or drum excessively weakened, insecure or fractured5.2%
937 testsBrake disc worn, pitted or scored explained
4.A tyre seriously damaged4.4%
786 testsTyre damaged or deteriorated explained
5.Tyre tread depth not in accordance with the requirements3.6%
638 testsTyre worn close to the legal limit explained
6.A suspension pin, bush or joint excessively worn3.4%
610 testsSuspension arm bush worn explained
7.Play in steering rack inner joint(s)3.2%
569 tests
8.Child Seat fitted not allowing full inspection of adult belt3.2%
568 tests

How wear changes the picture

Pass rate by vehicle age

3–5 yrs89%

6–8 yrs85%

9–11 yrs80%

Bands holding too few tests to be meaningful are omitted rather than shown as a rate.

What gets tested

The X4 fleet

Average mileage recorded at test: 62,706
Fuel mix of tested cars: Diesel75.7%
Diesel hybrid17.0%
Petrol5.9%
Hybrid1.4%

Trim names grouped into this model (11)

Recorded exactly as DVSA holds them. Trim-level names are rolled up so one model is not split across a dozen thin pages.

X4 M40D
X4 M40D M PRO EDITION MHEV A
X4 M40D MHEV AUTO
X4 M40I M PRO EDITION MHEV A
X4 M40I MHEV AUTO
X4 XDRIVE20D M SPORT MHEV AUTO
X4 XDRIVE20D M SPORT X MHEV A
X4 XDRIVE20D SPORT MHEV AUTO
X4 XDRIVE30D M SPORT MHEV AUTO
X4 XDRIVE30D M SPORT X MHEV A
X4 XDRIVE30D SPORT MHEV AUTO

Check a specific BMW X4

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other BMW models

BMW 3 Series — 80.0% adjusted
BMW 1 Series — 77.6% adjusted
BMW 5 Series — 82.0% adjusted
BMW 2 Series — 82.9% adjusted
BMW X1 — 79.5% adjusted
BMW 4 Series — 83.2% adjusted
All BMW models

Similar test volumes

Compare against other makes

Peugeot 508 — 75.9% adjusted, ranked 98
Volkswagen Caravelle — 72.4% adjusted, ranked 141
Skoda Roomster — 63.8% adjusted, ranked 232
Peugeot Bipper — 59.3% adjusted, ranked 254

Common questions

Is the BMW X4 reliable?: On MOT evidence the BMW X4 is well above average. It passes 84.7% of tests once age and mileage are accounted for, against a national average of 72.3%. That figure covers 60% of the national age and mileage range, which is enough to quote but not to rank. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.
What is the most common MOT failure on a BMW X4?: The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 18.5% of failed BMW X4 tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a BMW X4?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 25.4% of all BMW X4 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a BMW X4 usually have at its MOT?: The average odometer reading recorded at test is 62,706 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.
Does a BMW X4 get harder to pass as it ages?: Yes. At 3 to 5 years old, 89.0% of BMW X4 tests pass. By 9 to 11 years, that falls to 79.6%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.
Are most BMW X4 models petrol or diesel?: Of the BMW X4 cars tested, 76% are diesel, 17% are diesel hybrid, 6% are petrol. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. The adjusted rate is directly standardised across twenty-five age and mileage bands and reweighted onto the national distribution, so this model is compared against cars that have lived a similar life rather than against a younger or lighter-used fleet.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.