Audi Rs4 MOT Failures
An analysis of 6,958 real DVSA MOT tests on the Audi Rs4 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: B7 (2006–2008), B8 (2012–2015).
Where the Audi Rs4 fails its MOT
The single biggest MOT failure point on the Audi Rs4 is suspension joint dust cover severely deteriorated — this model is 6.3 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 6,958 MOT tests, 3.12% of all Audi Rs4 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 fluid leak (840x the fleet average), abs fault (10x the fleet average), suspension joint dust cover missing or no longe... (7.2x the fleet average), and brake hoses perished or damaged (6.1x the fleet average). These ratios compare the Audi Rs4'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 2 categories: Suspension, Brakes. If you're inspecting a Audi Rs4 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 Audi Rs4'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.
For the Audi Rs4 specifically, the DVSA data shows the most common failures at this mileage are abs fault (10x the average) and suspension joint dust cover severely deteriorated (5.8x). anti-roll bar links worn (5.7x) and anti-roll bar links worn also appear frequently.
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 Audi Rs4 specifically, the DVSA data shows the most common failures at this mileage are fluid leak (840x the average) and suspension joint dust cover severely deteriorated (5.1x).
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 Audi Rs4 specifically, the DVSA data shows the most common failures at this mileage are suspension joint dust cover missing or no longe... (7.2x the average) and suspension joint dust cover severely deteriorated (6.3x). brake hoses perished or damaged (6.1x) and brake hoses perished or damaged also appear frequently.
The shift from abs fault at lower mileages to suspension joint dust cover missing or no longe... 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.
Known issues beyond the MOT
An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that Audi Rs4 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
DRC suspension failure (B7) Major
The Dynamic Ride Control (DRC) system uses hydraulic pumps, accumulators, and electronically controlled dampers to provide adaptive suspension. Affects B7; typical independent garage repair cost is £800–£1,500.
Carbon buildup on intake valves (B7/B8) Major
Direct injection engines spray fuel directly into the combustion chamber, bypassing the intake valves. Affects B7, B8; typical independent garage repair cost is £400–£700.
Shock absorber failure Major
RS4 dampers experience higher failure rates than typical road cars due to the performance-oriented suspension setup and aggressive spring rates. Affects B7, B8; typical independent garage repair cost is £800–£1,200.
Brake hose deterioration Major
MOT data shows brake hose failures at 6 times the fleet average on higher mileage RS4s. Affects B7, B8; typical independent garage repair cost is £150–£300.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Audi Rs4 common problems breakdown.
What to check before buying a Audi Rs4
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Audi Rs4:
Suspension — check for suspension joint dust cover severely deteriorated, fluid leak, abs fault, suspension joint dust cover missing or no longe..., anti-roll bar links worn.
Beyond the MOT items, ask specifically about drc suspension failure and carbon buildup on intake valves. These won't show up on a standard MOT but can be expensive to fix — repairs start from £800. A specialist pre-purchase inspection is worth the investment on this model.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.
Looking at a specific Audi Rs4?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Audi Rs4 MOT FAQs
What are the most common MOT failures on a Audi Rs4?
Based on 6,958 DVSA MOT tests, the most common failure is suspension joint dust cover severely deteriorated — at 6x the national fleet average. Other frequent failures include fluid leak and abs fault.
Is the Audi Rs4 reliable based on MOT data?
The Audi Rs4 has 6 MOT failure categories above the fleet average. Specialists also flag drc suspension failure as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Audi Rs4 most commonly fails on suspension joint dust cover missing or no longe... and suspension joint dust cover severely deteriorated. Under 60,000 miles, the main issues are abs fault and suspension joint dust cover severely deteriorated.
How do I check a Audi Rs4'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.