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Discussion in 'A3/S3 Forum (8L Chassis)' started by Repooh, Dec 24, 2013.
Where would I start to replace a oxygen sensor ?
I'd start somewhere near the exhaust
unclip wiring harness
remove lambda sensor
replace lambda sensor
reattach wiring harness
easy 5 min job.
make sure you replace the broken one, depending on engine you may have 2.