Audi A4 B8 Catalytic Converter
Replacement catalytic converter — fitment, symptoms & live UK prices.
Fits Audi A4 B8 — check your reg/VIN to confirm
Catalytic Converter
Aftermarket £80–£250; OEM much more.
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Will it fit my Audi A4 B8?
Must be the correct emissions-spec cat for your engine and year, or it'll fail MOT. Type-approved units only.
Tip: filter by your reg on eBay's compatibility check, or match the part number stamped on your old unit.
Signs your Audi A4 B8 catalytic converter needs replacing
- P0420 / catalyst efficiency code
- Rattling inside (broken substrate)
- Failed emissions/MOT
- Sluggish, rotten-egg smell
Fitting it yourself
Bolt-on or welded depending on setup. Lambda sensors often transfer over.
See Catalytic Converter prices on eBayMore Audi A4 B8 parts
Water PumpAudi A4 B8HeadlightAudi A4 B8Wheel BearingAudi A4 B8AlternatorAudi A4 B8ExhaustAudi A4 B8EGR ValveAudi A4 B8
Live pricesAftermarket £80–£250; OEM much more.
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