Question 1

What is the Excessive Oil Consumption (EA888 Gen 2) issue on the Audi A4 Mk4 (B8)?

Accepted Answer

Faulty piston rings on early EA888 engines (CDNB, CDNC codes) cause severe oil burning as carbon blocks the thin oil control rings. Symptoms include: Needs frequent top-ups (more than 0.5L per 1,000 miles), Blue smoke after overrun, Sooty tailpipes. Estimated repair cost: £3,000–£5,000.

Question 2

What is the Water Pump / Thermostat Housing Leak issue on the Audi A4 Mk4 (B8)?

Accepted Answer

The plastic water pump and thermostat housing warp and leak coolant, a well-known weakness across the EA888 range. Some cars fail twice before 100k miles. Symptoms include: Low coolant warning, Pink crust near housing, Sweet smell after shutdown. Estimated repair cost: £350–£750.

Question 3

What is the Multitronic CVT Failure issue on the Audi A4 Mk4 (B8)?

Accepted Answer

Front-wheel-drive automatics use the Multitronic CVT which can judder, flare or lose drive if fluid changes were skipped or the control unit fails. Symptoms include: Rev flare under acceleration, Judder pulling away, Flashing PRNDS warning. Estimated repair cost: £1,000–£2,500.

Question 4

What is the Timing Chain Tensioner Failure issue on the Audi A4 Mk4 (B8)?

Accepted Answer

Pre-2013 EA888 Gen 1 and Gen 2 engines have a plastic timing chain tensioner that can fail, causing chain slack and potential engine destruction. Symptoms include: Rattle for a few seconds on cold start, Timing correlation fault codes, Harsh idle or non-start if chain jumps. Estimated repair cost: £900–£1,800.

Question 5

What is the Electric Steering Lock Failure issue on the Audi A4 Mk4 (B8)?

Accepted Answer

The electronic steering column lock (ELV) module can fail, preventing the car from starting or unlocking the steering. A known weak point on B8 cars. Symptoms include: Steering remains locked, Car will not start, Steering lock warning message. Estimated repair cost: £300–£800.

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