Replacing a catalytic converter in Europe costs between EUR 350 and EUR 1,800. The price is driven by three things: your vehicle, whether you fit OEM or type-approved aftermarket, and whether the car has one converter or two (V6 and V8 engines have two, one per cylinder bank). The cheapest jobs are bolt-on aftermarket cats for compact cars at around EUR 350 fitted. The most expensive are dealer-OEM replacements on premium German vehicles or commercial vans with twin converters, regularly past EUR 1,800. A failed catalytic converter is signalled by fault codes P0420 (Bank 1) or P0430 (Bank 2). Before replacing the cat itself, rule out the cheaper culprits first: a tired downstream oxygen sensor sets the same code at a fraction of the price.
Typical EU price€350 - €1,800Range covers parts plus labour for a single converter. Twin-converter V6 and V8 vehicles can double the upper figure.
Parts cost
Aftermarket (EU type-approved): €100 - €400. Common brands: Klarius, Bosal, Walker, Magnaflow, BM Catalysts.
OEM: €350 - €1500.
Aftermarket converters from reputable EU brands (Klarius, Bosal, Walker) are type-approved for road use in all EU member states. OEM is required only if you want to preserve manufacturer warranty or if your vehicle uses an integrated cat-manifold assembly that aftermarket has not yet replicated.
Labor cost
Range: €100 - €600. Typical labor time: 1.5 - 4 hours.
Independent workshop rate: €60-90/hr. Dealer rate: €120-180/hr.
Most converters are bolted to the exhaust with three or four flange bolts plus oxygen sensor wiring. Frequent complication: corroded bolts that need cutting off, adding 30 to 60 minutes. Welded-in converters require exhaust shop work.
Can you DIY this repair?
Difficulty: moderate. Bolt-on replacements are achievable for an experienced home mechanic with a vehicle jack, axle stands, and an oxygen sensor socket. Save EUR 100-300 versus an independent shop. Welded converters require an exhaust shop. Do not skip the oxygen sensor swap if your converter failed because of a contaminated upstream sensor.
Warning signs you need this repair
- Check engine light with code P0420 or P0430 stored
- Failed emissions test at TÜV, ITV, TA, SKP, or MOT (HC and CO above limit)
- Sulphur or rotten-egg smell from the exhaust under load
- Loss of power and poor fuel economy as the cat becomes physically clogged
- Rattling sound from the cat body, indicating the ceramic substrate has broken apart
- Slow acceleration that feels like the throttle is unresponsive (cat blockage)
- Higher than normal exhaust temperature near the cat housing
When to replace
Replace the catalytic converter when (1) a P0420 or P0430 code returns after addressing the upstream causes (oxygen sensors, vacuum leaks, misfires), and (2) you have confirmed with a back-pressure test or post-cat oxygen sensor reading that the cat is genuinely failing. Replacing a cat without ruling out upstream causes will set the same code again within weeks - the new cat will be poisoned by whatever was wrong upstream.
When you can keep driving
You can drive with P0420 or P0430 active for weeks or months without engine damage, provided no other codes are present. The risk is purely emissions, not mechanical. Useful when budgeting for the repair or running out a vehicle near sale or trade-in. Note that any EU vehicle inspection (TÜV, ITV, TA, SKP, MOT) will fail with a check engine light on.
Diagnosis before replacing
- Confirm the code is P0420 or P0430. If it is P0421 or P0431, the cat efficiency is borderline and may recover with cleaning or after an O2 sensor swap
- Test both upstream and downstream oxygen sensors with a scan tool live data view. A failing downstream sensor mimics a failed cat at a fraction of the cost
- Check fuel trims at idle and at 2,500 RPM. Long-term fuel trim above plus or minus 10 percent indicates an upstream problem that will kill a new cat
- Look for misfire counters on any cylinder. A misfire dumps unburned fuel into the cat, melting the substrate. Fix misfires first
- Perform a back-pressure test. Above 40 kPa at 2,500 RPM means the cat is physically restricted - replace
- Inspect for visible damage. A heat-blued cat housing or rattling from the cat body confirms internal substrate failure
Toyota Camry
2007-2024
Toyota Camry uses two converters on V6 models and one on 2.5L four-cylinder. The 2.5L 2AR-FE engine is well served by aftermarket cats. Hybrid Camry cats are higher-value (platinum-rich) and a theft target in urban Europe.
Parts: €280 - €900
Labor: €120 - €280
Honda Civic
2006-2024
Honda Civic has strong aftermarket availability - Klarius, Bosal and Walker all produce direct-fit cats. The 1.5L turbo (2016+) uses a close-coupled cat that is integrated into the exhaust manifold on some markets, raising the cost significantly when that assembly fails.
Parts: €220 - €700
Labor: €100 - €250
Volkswagen Golf
2005-2024
Golf petrol models (1.4 TSI, 2.0 TSI) have a close-coupled cat that sometimes integrates with the exhaust manifold (EA888 generation 3), pushing OEM cost towards the upper end. Aftermarket alternatives exist for the bolt-on cats on Mk5, Mk6 and Mk7. Golf TDI diesel uses a DPF instead of a traditional cat - check P2002 instead of P0420.
Parts: €320 - €1100
Labor: €150 - €400
BMW 3 Series
2006-2024
BMW 3 Series with the N52 (straight-six petrol) uses two converters. The N20 and N26 four-cylinder turbo engines use a close-coupled cat integrated with the turbocharger downpipe - replacement is the most expensive scenario in this price range. F30 and G20 diesels use a DPF, not a traditional cat. Used BMW cats command premium scrap prices.
Parts: €500 - €1500
Labor: €200 - €600
Ford Focus
2008-2024
Ford Focus aftermarket support is strong across all generations. The 1.0 EcoBoost (Mk3 onwards) has a close-coupled cat that is replaced as a unit with the downpipe on some model years - this is the upper-end scenario. Older 1.6 and 1.8 petrol models have a simple bolt-on cat that is among the cheapest jobs in this list.
Parts: €220 - €700
Labor: €100 - €280
Mechanic blames the cat without verifying with diagnostics
Insist on seeing the live data from both oxygen sensors. The downstream sensor should be near 0.6 to 0.8 volts and largely steady. A cat is only definitively failed when the downstream sensor tracks the upstream sensor.
OEM-only quote when aftermarket is type-approved
Type-approved aftermarket cats from Klarius, Bosal, Walker, Magnaflow or BM Catalysts are legal across the EU and typically half the OEM price. Ask why OEM is being specified - the only legitimate reasons are warranty preservation or an integrated cat-manifold assembly that aftermarket has not replicated.
Quote includes oxygen sensors but not back-pressure check
Replacing the cat without fixing the upstream cause will set P0420 again within weeks. Either replace the upstream oxygen sensor as part of the job or have the shop document why it is not necessary.
Theft risk in some EU countries
Hybrid Toyota and Lexus cats are favourite theft targets in Germany, the United Kingdom and the Netherlands due to high metal content. After a theft, replacement is often quoted near the upper end of the range. Insurance typically covers it. Consider a Catloc cage or stamping the VIN onto the housing as deterrents.
Germany
TÜV will not pass a vehicle with a stored P0420 even after the light is cleared until the EVAP and cat monitors complete. Aftermarket cats must be type-approved with KBA documentation - retain the paperwork.
Poland
Aftermarket cat prices are typically 15 to 25 percent below the EU average due to local distributors. iParts.pl, allegro.pl and intercars.pl are common sources. Stacja kontroli pojazdów (SKP) requires the cat to be physically present and intact - removal will fail inspection.
Lithuania
Used-car imports from Germany commonly have P0420 stored from the pre-import test drive. Demand an OBD2 scan as part of any pre-purchase inspection. Techninė apžiūra (TA) inspection will fail with the light on.
United Kingdom
MOT does not currently fail a vehicle solely for a stored P0420 (it tests tailpipe emissions directly), but the check engine light is a separate fail point. Aftermarket cats must meet UK type approval.
How much does a catalytic converter replacement cost in Europe?
Between EUR 350 and EUR 1,800 for parts plus labour on a single converter. Compact petrol cars at the low end, premium German vehicles and twin-cat V6 and V8 engines at the high end. Aftermarket parts can halve the price compared to OEM.
Is it worth replacing a catalytic converter on an older car?
Run a quick calculation. If the parts plus labour quote exceeds 25 to 30 percent of the vehicle's market value, you are usually better off selling the car as-is to a buyer who can scrap the cat (worth EUR 30 to EUR 250) and disposing of the rest. EU vehicle inspection rules make passing with an active check engine light impossible, so an unrepaired cat eventually retires the car anyway.
Can I replace the catalytic converter myself?
Yes for bolt-on designs - you need a jack, axle stands, an oxygen sensor socket and patience with corroded bolts. Save EUR 100 to EUR 300 versus an independent shop. Welded-in converters require an exhaust shop. Always replace the upstream oxygen sensor if it has more than 100,000 km on it - a tired sensor will poison your new cat within months.
Why is the BMW or Mercedes catalytic converter so much more expensive?
Two reasons. First, premium German vehicles often use a close-coupled cat that is integrated with the turbocharger downpipe or exhaust manifold - replacement is a single assembly, not just the cat. Second, OEM cats from BMW and Mercedes carry significant brand premium. Type-approved aftermarket alternatives exist but coverage is narrower than for mass-market brands.
What is the scrap value of my old catalytic converter?
EUR 30 to EUR 250 for most cats, depending on size and precious metal content. Premium BMW, Mercedes, Audi and Volvo cats can fetch EUR 400 or more. Hybrid Toyota cats are at the high end. Sell to a metal recycler or have the workshop deduct the value from your invoice - never bin a used cat.
Will an aftermarket catalytic converter pass TÜV or ITV?
Yes, provided it is type-approved for road use in the EU. Reputable EU aftermarket brands (Klarius, Bosal, Walker, Magnaflow, BM Catalysts) supply documentation showing type approval, which you keep with the vehicle registration. Cheaper unbranded cats from internet marketplaces often lack approval and will fail technical inspection.
How do I know if it is really the cat or just the oxygen sensor?
Check the live data from the downstream oxygen sensor. On a healthy cat it should sit between 0.6 and 0.8 volts with very little variation. On a failed cat it tracks the upstream sensor (rapidly switching from low to high). A failed downstream sensor produces a similar fault code at a fraction of the cost - always test before replacing the cat.
Diagnose the issue first with Skanyx
Don't pay for a repair you don't need. Skanyx scans your fault codes, ranks repair urgency, and shows you EUR cost estimates before you visit the shop.
Get the Skanyx app