Model Guide
Audi A4 Used Buying Guide
A refined used car with strong long-distance ability, but engine generation and gearbox history make a huge difference. Confirm the exact engine, not just the badge.
Ownership plan
Use this as the first-month plan after viewing the car. It keeps the inspection practical and turns vague risk into jobs you can price.
Confirm engine code before applying generic TFSI/TDI advice.
Build an early baseline around oil level tracking, coolant inspection, and gearbox adaptation/scan data.
If quattro is fitted, confirm which system it uses and whether the relevant fluid service has been done.
Engines and versions to understand
EA888 TFSI
MediumGeneration matters for timing and oil consumption risk.
2.0 TDI
MediumStrong when serviced; check emissions and injector data.
V6 TDI
HigherSmooth and capable, but repairs and emissions costs rise.
S/RS variants
HigherPerformance maintenance history is non-negotiable.
Common problems
- EA888 timing chain and oil consumption on sensitive generations.
- Carbon buildup on direct-injection petrol engines.
- S tronic/DSG service intervals and mechatronics symptoms.
- Cooling leaks, thermostat housings, and sensor faults.
- Quattro system assumptions: verify actual drivetrain type and service.
Inspection checklist
- Confirm engine code and gearbox type before applying reliability advice.
- Check for oil consumption history and timing chain invoices.
- Scan gearbox and engine modules after a proper test drive.
- Inspect coolant residue and listen for cold-start rattle.
- Verify quattro/Haldex service if applicable.
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Related reading
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