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Audi AGB
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Audi AGB
Verdict
RISKY · 42/100
Est. cost /3yr
€8,000-15,000 over 3 years depending on condition, service history and required repairs at time of purchase
Oil interval
7,500 km
Recalls
0
Worst issue
Turbocharger Failure (Twin K03/K04 Units)
CRITICAL
Audi AGB
B5 · B5 RS4
Turbocharger Failure (Twin K03/K04 Units)
€2,000-5,000
CRITICAL
Oil Leaks (Rear Main Seal, Cam Cover Gaskets, Valley Pan)
€800-2,500
CRITICAL
Timing Belt and Tensioner Failure
€600-1,500
HIGH
Water Pump Failure
€400-1,000
HIGH
High Maintenance and Running Costs
€1,500-4,000
MODERATE
Audi AGB
B5 · B5 RS4
•Demand documented timing belt and water pump replacement history with dates and mileage, walk away if unavailable
•Inspect the valley between cylinder banks thoroughly for oil leaks from the valley pan gasket
•Test both turbos under full load, check for lag, smoke, or uneven boost across the rev range
•Check all oil feed and return lines to both turbochargers for blockage or carbonisation
•Verify coolant condition and check for mayonnaise under oil cap indicating head gasket concerns
•Use an OBD II scanner to check for stored boost, misfire, or sensor fault codes before purchase
Audi AGB
B5 · B5 RS4
Timing Belt, Tensioner and Idler Kit
Replace immediately if history is unknown, catastrophic engine failure risk on an interference engine now 20+ years old
Every 60,000 km or 4 years maximum
Water Pump
Replace together with timing belt service as a matter of course
Every 60,000 km
Turbocharger Oil Feed Lines
Inspect and flush or replace to prevent oil starvation and turbo bearing failure
Inspect at every major service
Valley Pan Gasket
Inspect carefully, if leaking, budget for full replacement as access requires substantial disassembly
100,000-180,000 km
Audi AGB
B5 · B5 RS4
No recalls on record
Audi AGB
B5 · B5 RS4
✓Exceptional performance for the era, genuine RS pedigree
✓Strong tuning potential, community confirms K04 and larger turbo upgrades are well-documented
✓Engaging, characterful driving experience with twin-turbo V6 soundtrack
✓Parts availability remains reasonable through specialist suppliers
Audi AGB
B5 · B5 RS4
Real consumption
14 L/100km
Official consumption
Not available
Oil interval
7,500 km
Oil spec
5W-40 fully synthetic, VW 502.00 specification
Est. cost /3yr
€8,000-15,000 over 3 years depending on condition, service history and required repairs at time of purchase