AUDI A8 Catalytic converter replacement Cost
2003–2005 · Engine, Fuel & Emissions system
Typical range
$759–$11.5k
Parts + labour
Labour hours
1–6h
At a typical garage
The catalytic converter reduces harmful exhaust gases by converting them to less toxic compounds. A failing cat triggers a P0420 check engine light, may produce a sulphur smell and can reduce engine power. AUDI A8 catalytic converter replacement costs $759–$11493—one of the more expensive emission-related repairs.
Typical parts included
- Catalytic converter
What affects the price
- OEM vs direct-fit aftermarket vs universal (OEM recommended for emissions compliance)
- Whether the vehicle has multiple catalytic converters (common on V6/V8)
- Whether upstream oxygen sensors need replacing at the same time
Common questions
How long does this repair take?
Catalytic converter replacement on a AUDI A8 typically takes 1–6 hours at a garage.
How often does this need to be done?
For a AUDI A8, this is typically needed catalytic converters are replaced on failure; typical lifespan is 100,000–150,000 miles with good maintenance.
Other engine, fuel & emissions system repairs on the AUDI A8
- ABS hydraulic unit replacement$468–$842
- ABS sensor replacement$193–$347
- ABS system bleeding$154–$277
- AC compressor clutch replacement$385–$693
- AC compressor replacement$413–$743
Catalytic converter replacement cost on similar cars
- MERCEDES BENZ S-Klasse and predecessors$385–$693
- BMW 7 Series$385–$693
- JAGUAR XJ$385–$693
- VOLKSWAGEN Phaeton$385–$693
- MASERATI Quattroporte$420–$756
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