Audi A4 S Line TDI (2014)
2014 Audi A4 S Line TDI
CarHunch analysed 572 real MOT records for the 2014 Audi A4 S Line TDI.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2014 Audi A4 S Line TDI is a notably weak performer on the MOT bench, with a first-time pass rate of just 64.6%—significantly below the UK average of 80%—suggesting these cars face real reliability challenges as they age into their second decade. The good news is that dangerous defects are virtually absent (0%), so while you're more likely to encounter problems, they're unlikely to be safety-critical.
These diesels are averaging 96,835 miles, which is realistic for their age, yet they're still averaging 0.41 failures per vehicle—telling you that maintenance neglect or wear on common diesel components is genuinely widespread in this cohort. Before buying, have a pre-purchase inspection focus on the fuel system, turbo, and emission controls, as these are where TDI failures typically cluster.
The 2014 Audi A4 S Line TDI passes its MOT first time more often than most UK vehicles (89.9% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.
These stats describe 572 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 572 Audi A4 S Line TDI cars.
Before you buy a 2014 Audi A4 S Line TDI
Based on MOT data from 572 vehicles — here's what to check.
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Check the full MOT history.
0% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (100%) | 570 | 89.9% | 0.41 |
Colour Breakdown
Based on 4,486 Audi A4 S Line TDI vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2014 Audi A4 S Line TDI vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2014 Audi A4 S Line TDI vehicles fall between 75,566 and 112,639 miles.
2014 Audi A4 S Line TDI — Still on the Road
Almost all 2014 Audi A4 S Line TDIs are still on the road.
Strong survival — 315 vehicles still getting MOTs in 2025, 100% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2018–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.
MOT History Averages
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Compare with another model
See how the 2014 Audi A4 S Line TDI stacks up against a rival.