AUDI A4 Cabriolet Oxygen (lambda) sensor replacement Cost
2002–2005 · Engine, Fuel & Emissions system
Typical range
$131–$244
Parts + labour
Labour hours
0.5–2h
At a typical garage
Oxygen (lambda) sensors measure the oxygen content of the exhaust to help the ECU maintain the correct air–fuel ratio. A failed sensor causes the engine to run rich or lean, increasing fuel consumption and emissions. AUDI A4 Cabriolet oxygen sensor replacement costs $131–$244.
Warning signs you need this repair
- Check engine light with codes P0130–P0167 or P0036–P0058
- Noticeably worse fuel economy
- Failed emissions test
- Rough idle or hesitation under acceleration
- Catalytic converter failing prematurely (rich running destroys the catalyst)
What affects the price
- Upstream (pre-cat) vs downstream (post-cat) sensor position
- Number of sensors on V6/V8 engines
- OEM vs universal fit sensor (OEM recommended for accurate readings)
Common questions
How much does oxygen (lambda) sensor replacement cost on a AUDI A4 Cabriolet?
Oxygen (lambda) sensor replacement on a AUDI A4 Cabriolet (2002–2005) typically costs between $131 and $244 including parts and labour at an independent garage.
What parts are needed for oxygen (lambda) sensor replacement on a AUDI A4 Cabriolet?
Consult your mechanic for the specific parts required for your vehicle.
How long does oxygen (lambda) sensor replacement take on a AUDI A4 Cabriolet?
Oxygen (lambda) sensor replacement on a AUDI A4 Cabriolet typically takes 0.5–2 hours of labour at a garage.
How often does oxygen (lambda) sensor replacement need to be done?
For a AUDI A4 Cabriolet, oxygen (lambda) sensor replacement is typically needed every 60,000–100,000 miles for standard sensors; longer for wideband sensors on newer vehicles.
Other engine, fuel & emissions system repairs on the AUDI A4 Cabriolet
- ABS hydraulic unit replacement$446–$829
- ABS sensor replacement$184–$341
- ABS system bleeding$147–$273
- AC compressor clutch replacement$368–$683
- AC compressor replacement$394–$731
Oxygen (lambda) sensor replacement cost on similar cars
- MERCEDES BENZ E-Klasse Cabriolet and predecessors$131–$244
- BMW Z4 Roadster$131–$244
- SAAB 9-3 Convertible$131–$244
- CHEVROLET Camaro Convertible$158–$293
- VOLKSWAGEN Golf Cabrio$131–$244
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