Audi A4 S Line Nav TDI CVT (2015)
2015 Audi A4 S Line Nav TDI CVT
CarHunch analysed 112 real MOT records for the 2015 Audi A4 S Line Nav TDI CVT. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2015 Audi A4 S Line Nav TDI is a real concern: only 54.8% pass their MOT first time, compared to the UK average of 80%, and that gap signals genuine reliability problems rather than unlucky outliers. The good news is that dangerous defects are extremely rare (0%), so what's failing is mainly wear-and-tear items rather than safety-critical systems.
At 82,654 miles median mileage, these cars are running high for their age, which partly explains the 0.37 average failures per vehicle—but the diesel engine's reputation for robustness means most issues are probably brakes, suspension, or exhaust work rather than engine problems. If you're considering one, budget for an independent pre-purchase inspection focused on the transmission, suspension geometry, and DPF health, because the MOT data suggests CVT gearbox and chassis wear are where owners are hitting trouble.
What to check before buying a 2015 Audi A4 S Line Nav TDI CVT
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Audi A4 S Line Nav TDI CVT
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (99%) | 111 | 54.7% | 0.35 |
| Gas Bi-Fuel (1%) | 1 | 66.7% | 2 |
Mileage Distribution
Most 2015 Audi A4 S Line Nav TDI CVT vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2015 Audi A4 S Line Nav TDI CVT vehicles fall between 72,947 and 97,527 miles.
2015 Audi A4 S Line Nav TDI CVT — Still on the Road
Strong survival — 57 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 2019–2025.
MOT History Averages
Found a specific Audi A4 S Line Nav TDI CVT?
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