What year Audi A4 S Line TDI is most reliable?

Based on MOT first-test pass rates, the 2016 Audi A4 S Line TDI has the highest pass rate at 92.7%, out of 459 vehicles tested.

What are the most common Audi A4 S Line TDI MOT failures?

The most common Audi A4 S Line TDI MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

CarHunch

Get Started

Audi A4 S Line TDI — Reliability by Year

4,329 vehicles · MOT data 2005–2017 · first-test pass rates

This page shows MOT first-test pass rates for each year the Audi A4 S Line TDI was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

✓

Best pass rate year

2016

92.7% pass rate · 459 vehicles

⚠

Lowest pass rate year

2005

74.5% pass rate · 660 vehicles

Year	Pass rate	Avg mileage	Vehicles
2017	90.6%	74,057 mi	356
2016	92.7%	81,226 mi	459
2015	90.4%	95,381 mi	250
2014	89.9%	94,098 mi	572
2013	88.6%	103,099 mi	288
2012	84.8%	117,849 mi	295
2011	83.6%	120,280 mi	270
2010	83.0%	124,157 mi	429
2009	80.3%	137,886 mi	553
2008	77.1%	140,548 mi	197
2005	74.5%	155,558 mi	660

Which year Audi A4 S Line TDI is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests. Green = noticeably above average for this model; red = noticeably below average.

Tests range from an average of 74,057 miles (newest year) to 155,558 miles (oldest year). Older years naturally accumulate more tests at higher mileages — see the mileage-normalised breakdown →

Trying to decide which year to buy?

We've done the full analysis — which years to look for, which to avoid, and where to find the best value for reliability on a Audi A4 S Line TDI.

See the buying guide →

← All Audi models

Check any UK registration — free MOT history and risk insights.