What reliability score does the Audi A4 get?

3.5 out of 10, scored from the 8 faults we document for this model and how severe each one is.

Is the 2009–2016 Audi A4 reliable?

Scored from 8 documented faults · reviewed by the VehicleFaults Research Team

Quick answer

3.5/ 10

Buy with caution

On our documented-fault scoring the Audi A4 rates 3.5 out of 10 · buy with caution. We hold 8 known faults for it and 1 of them are rated critical and 2 high, so a bad example can be expensive. The weak points cluster around engine, intake and cooling. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.

Verdict · Walk unless the history is spotless

What the score is built from

Critical: 1
High: 2
Medium: 4
Low: 1

Weak points cluster around engine, intake, cooling, suspension.

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The faults that decide it

EngineCritical

Timing chain tensioner failure — can cause catastrophic damage if it lets go.

Typically appears: 80,000+ miles
What to inspect: Listen for a rattle on cold start; confirm updated tensioner was fitted.
Typical repair: Timing chain, tensioner & guides · £900–£2,400

EngineHigh

2.0T TFSI excessive oil consumption from worn piston rings (early builds).

Typically appears: 60,000+ miles
What to inspect: Check oil level and top-up history; watch for smoke and ask about ring/piston work.
Typical repair: Oil leak trace & seal / gasket · £180–£700

TransmissionHigh

Jerky shifting, hesitation pulling away, or stalling due to S tronic (DL501) mechatronic unit failure.

Typically appears: 60,000-80,000 miles
What to inspect: With the engine running, shift from Reverse to Drive several times. Note any delay or harsh clunking. Pull away slowly on a slight incline to check for clutch judder or hesitation.
Typical repair: DCT clutch pack / mechatronic work · £900–£3,200

IntakeMedium

Carbon buildup on intake valves.

Typically appears: 70,000+ miles
What to inspect: Watch for rough idle/misfires; ask about walnut blasting.
Typical repair: Routine repair · £180–£700

CoolingMedium

Water pump and thermostat (plastic) failure.

Typically appears: 70,000+ miles
What to inspect: Check for coolant leaks and overheating history.
Typical repair: Head gasket / cooling system repair · £900–£2,600

Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.

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What the score is built from

The faults that decide it

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Reliability of other Audi models