BMW 630 MOT Failures
An analysis of 20,179 real DVSA MOT tests on the BMW 630 — what fails, how often, and how that compares to every other car on UK roads.
Where the BMW 630 fails its MOT
The single biggest MOT failure point on the BMW 630 is anti-roll bar links worn — this model is 11 times more likely to fail on this item than the average car on UK roads. That makes it worth watching for anyone buying or owning this model. Across 20,179 MOT tests, 3.36% of all BMW 630 tests recorded this as a failure.
Suspension failures typically mean worn bushes, drop links, or dampers. These affect handling and tyre wear. Budget £150–£400 per corner at an independent garage for full suspension overhaul.
Other notable weak points include any fracture or welding defect on a wheel (17x the fleet average), light unit fault (6.1x the fleet average), brake hoses perished or damaged (5.4x the fleet average), and abs fault (5.4x the fleet average). These ratios compare the BMW 630's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.
The failures span 4 categories: Suspension, Wheels, Lights & Electrics, Brakes. If you're inspecting a BMW 630 before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.
How failures change with mileage
The BMW 630's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.
Under 60,000 miles
At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.
The standout failure at this mileage is brake pipes corroded at 5.1x the fleet average.
60,000 to 100,000 miles
This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.
For the BMW 630 specifically, the DVSA data shows the most common failures at this mileage are anti-roll bar links worn (11x the average) and brake hoses perished or damaged (5.4x). abs fault (5.4x) and abs fault also appear frequently.
Over 100,000 miles
High-mileage cars accumulate failures across multiple systems. The key question isn't whether things will need doing — they will — but whether the car has been maintained well enough to keep on top of them. Look for a consistent service history and recent MOT passes with minimal advisories.
For the BMW 630 specifically, the DVSA data shows the most common failures at this mileage are any fracture or welding defect on a wheel (17x the average) and anti-roll bar links worn (6.4x). light unit fault (6.1x) and light unit fault also appear frequently.
The shift from brake pipes corroded at lower mileages to any fracture or welding defect on a wheel at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.
What to check before buying a BMW 630
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a BMW 630:
Suspension — check for anti-roll bar links worn, abs fault. Wheels — check for any fracture or welding defect on a wheel. Lights & Electrics — check for light unit fault. Brakes — check for brake hoses perished or damaged, brake pipes corroded.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. Enter any reg into our free car check to see the complete picture.
Looking at a specific BMW 630?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
BMW 630 MOT FAQs
What are the most common MOT failures on a BMW 630?
Based on 20,179 DVSA MOT tests, the most common failure is anti-roll bar links worn — at 11x the national fleet average. Other frequent failures include any fracture or welding defect on a wheel and light unit fault.
Is the BMW 630 reliable based on MOT data?
The BMW 630 has 6 categories where it fails more often than average. The main concern is anti-roll bar links worn. Always check a specific car's full history before buying.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the BMW 630 most commonly fails on any fracture or welding defect on a wheel and anti-roll bar links worn. Under 60,000 miles, the main issues are brake pipes corroded.
How do I check a BMW 630's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.