Audi A4 B9 facelift 2 45 TFSI, 265 PS, 7-speed dual-clutch, all-wheel drive (2020–2024)

Research for this car

• Generation guide Audi A4 B9 (2015-2024): known problems and buying guide

  Buy with care. Check the 3.0 TDI camshaft and chain, petrol oil use and the suspension before you pay.

• Engine guide VW 2.0 TSI (EA888 gen 3 and 4) petrol: problems, costs and what to check

  A strong engine with known weak spots, so check the water pump, turbo and oil leaks before you buy.

• Gearbox guide Audi DL382 7-speed S tronic (0CK): problems, costs and what to check

  A smooth gearbox when serviced, but mechatronic and clutch bills are large, so buy only with a scan and oil records.

Known issues for this car

Before you buy this car

From the generation guide

1. Check the oil level when the engine is cold. Ask for the top-up record with dates and kilometres. A car that needs regular top-ups between services is a warning sign.
2. Drive over a rough road and listen for knocks from the front and rear axle. Ask for alignment and suspension work records. Inspectors often flag suspension mounts at the German HU (the statutory inspection).
3. Pair a phone over Bluetooth and start Apple CarPlay during the test drive. A failed pairing or CarPlay that will not start is a warning sign. A fault memory read needs a scanner.

From the engine guide

1. Coolant and water pump (scanner). Check the coolant level when cold. Look for a puddle under the front centre of the car. Read the stored faults for P00B7 (low coolant flow). Ask for an invoice showing the pump and housing were replaced as one assembly. Bad: low coolant, P00B7, or overheating. A missed leak can wreck the engine: 4,000-15,000 GBP for major damage (UK, 2025).
2. Turbo and wastegate (test drive, scanner). Check that boost builds smoothly with no hesitation and no warning light. Ask for turbo or actuator invoices. Bad: boost loss, a warning light, or a turbo replaced with no paperwork.
3. Oil in the intake (scanner). Ask whether the car was driven hard or on track. Check for a rough idle, a check-engine light, and oil in the intake. Bad: any of these, or a track history with no service record.
4. Oil leaks at the back of the engine (no scanner). Look under the engine and where it meets the gearbox. Bad: oil at the rear seal. The fix needs the gearbox separated from the engine, so the job is large.

From the gearbox guide

1. Mechatronic scan (needs a scanner). Read the gearbox fault memory for P0718, P0811, P0607, P179B and P17D1. Bad result: stored faults or a recent limp mode.
2. Cold clutch test. Pull away uphill and reverse up a ramp, twice. Judder means clutch work.
3. Pump motor history (needs a scanner). Check for pump and circuit board faults. A failed motor can stop the car.
4. Speed sensor campaign. Ask a dealer for campaigns 34 22 54 and 34 23 62. Scan for P0718 and P2768.
5. Oil leaks. Check the plastic pan, mechatronic and housing joint.
6. Oil records. Look for 60,000 km oil changes with G 055 529 A2. Stamps prove nothing.

Running costs

ADAC figures for 15,000 km a year over 60 months

ADAC versions