PORSCHE 911 Carrera 4 Catalytic converter replacement Cost
2001–2005 · 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. PORSCHE 911 Carrera 4 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 PORSCHE 911 Carrera 4 typically takes 1–6 hours at a garage.
How often does this need to be done?
For a PORSCHE 911 Carrera 4, 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 PORSCHE 911 Carrera 4
- 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
- BMW 3 Series Coupe$350–$630
- MERCEDES BENZ E-Klasse Coupe and predecessors$350–$630
- AUDI A5$350–$630
- SAAB 9-3 Coupe$350–$630
- FORD Mustang$347–$635
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