Direct-fit three-way catalytic converters for German petrol vehicles — Volkswagen, Audi, BMW, Mercedes-Benz, Opel and Porsche applications, from Euro 3 through Euro 6d. Every unit is built on a high-density ceramic honeycomb substrate with a platinum–palladium–rhodium washcoat, inside a double-layer stainless steel shell, and is supplied as a bolt-on replacement matched to your model, year and engine.
Specification
| SKU | GI-TWC-100 |
|---|---|
| Product type | Three-way catalytic converter (TWC) — aftermarket replacement, application-matched |
| Emission compliance | Built to UN/ECE R103 replacement-converter requirements · Euro 3 / 4 / 5 / 6 / 6d version matched to the vehicle |
| Conversion efficiency | CO / HC / NOx conversion ≥ 95% over the R103 test cycle |
| Substrate | High-density cordierite honeycomb, 400 cpsi (600 cpsi on Euro 6 / 6d units) |
| Coating | Pt / Pd / Rh precious-metal washcoat with oxygen-storage components |
| Housing | Double-layer stainless steel (409 / 439), seam-welded, leak-free |
| Heat shield | Welded stainless steel shield — standard on Euro 6 / 6d, optional on earlier tiers |
| Temperature range | Continuous 900 °C · short-term peaks up to 1,100 °C |
| Service life | 80,000–120,000 km in normal road use |
| Fuel type | Petrol engines only — not suitable for diesel vehicles (this part has no DPF function) |
| Installation | Direct-fit, 1:1 mounting positions, no cutting or welding required |
| Typical fitting time | 15–20 minutes at a workshop |
| Weight / box | 4.1–7.5 kg by application · approx. 45 × 25 × 22 cm |
| Condition | New, aftermarket |
Specification is our standard build sheet for the range. Final figures for your vehicle are confirmed in writing against the model, year, engine and — where available — the OE number on the old unit, before you pay.
Vehicle applications
The range covers the German petrol fleet that dominates the EU parc. Matching is done by brand, model, model year and engine displacement — never by outside dimension alone.
| Brand | Typical applications | Engines | Emission tiers |
|---|---|---|---|
| Volkswagen | Golf V / VI / VII, Passat B6–B8, Tiguan, Touran, Polo | 1.2–2.0 TSI | Euro 4 – 6d |
| Audi | A3 8P / 8V, A4 B8 / B9, A6 C7, Q3, Q5 | 1.4–2.0 TFSI | Euro 4 – 6d |
| BMW | 1 Series F20, 3 Series E90 / F30, X1, X3 | 1.6–2.0 petrol | Euro 4 – 6d |
| Mercedes-Benz | A-Class W176 / W177, C-Class W204 / W205, GLA | 1.6–2.0 petrol | Euro 5 – 6d |
| Opel | Corsa D / E, Astra J / K, Insignia | 1.0–1.6 petrol | Euro 4 – 6d |
| Porsche | Macan | 2.0 petrol | Euro 6 – 6d |
Diesel versions of the models above are not covered — a diesel car needs a DPF system, not a three-way converter. Ordering a petrol converter for a diesel is the one mistake we work hardest to prevent.
What’s included
- 1 × three-way catalytic converter, application-matched
- Mounting gasket set
- Bolt and nut kit
- Individual box, bulk carton on request
- Compliance sheet and installation guide in the box documents
How we confirm fitment
Send us brand + model + year + engine displacement, and the OE number stamped on your old unit if you can read it. We reply in writing with the exact Euro tier, flange layout and lambda-sensor positions for your car — before money moves. Confirmed-fit orders are never left with the buyer holding the risk.
Compliance: built to meet UN/ECE R103 replacement-converter requirements, with the Euro standard matched to your vehicle. Petrol engines only — not for diesel DPF applications. Tell us your destination market and we confirm what we can ship before you order.
Installation notes
- Fitted from below on a lift; let the exhaust cool fully before starting.
- Always fit the new gaskets supplied; torque the flange bolts to the vehicle specification.
- Clear adapted values / reset emissions readiness after fitting so the ECU re-learns with the new converter.
- Professional installation is recommended. The 12-month warranty assumes correct fitting with new gaskets.
Questions buyers ask
Will it pass the roadworthiness test (HU/TÜV, MOT, ITV, contrôle technique…)?
The converter is built to the UN/ECE R103 replacement-converter requirements and to the Euro standard your vehicle is certified against. With professional installation it is designed to pass the emissions part of the periodic inspection in EU markets. Tell us the country and we confirm the applicable standard before you order.
Will the engine management light come back on?
A persistent warning lamp is usually the reason the old converter comes off in the first place. Our units are calibrated to the vehicle’s ECU and lambda-sensor signals, so after professional installation and an emissions-readiness reset the system runs without a fault code for the converter. If a lamp returns, we troubleshoot it with you — sensors and wiring are the usual suspects, not the catalyst itself.
Is it really a direct fit?
Yes for the applications we confirm in writing: mounting flanges, pipe diameter and sensor bosses are 1:1 to the original position. No cutting, no welding, no fabrication. A workshop fits it in 15–20 minutes.
My car is a diesel — does this fit?
No. Three-way converters only work on petrol engines. A diesel vehicle needs a DPF (diesel particulate filter) system, which is a different product. Tell us the car and we will tell you honestly whether we can supply the right part.
Which Euro standard does my car need?
It is fixed by model and model year, not by choice: roughly Euro 3/4 for older petrol cars (large stock in Southern and Eastern Europe), Euro 5/6 for the mainstream fleet in Germany, France, Italy and the UK, and Euro 6d for vehicles registered from around 2019 onwards. Send the model, year and engine and we confirm the exact tier.
Why is this more expensive than the cheapest listing online?
Suspiciously cheap converters are typically stripped or rebuilt scrap units with reduced or no precious-metal loading. They fail inspections, trigger warning lamps and cannot be legally sold in the EU. Ours are new, fully loaded units built to the R103 requirement set — the price difference is the coating.
What is the warranty?
12 months against manufacturing defects from the date of delivery: leakage, abnormal noise, substrate damage and workmanship. Excluded: incorrect installation, accident damage, misuse and fitting to a diesel vehicle.
Can workshops and distributors order in volume?
Yes — that is what the range is built for. Volume pricing works in tiers (small batch / workshop / container), and repeat customers get a stable price list. Mixed orders with other parts ship consolidated.
How fast do you ship to Europe?
Western Europe typically 7–12 days, Southern and Eastern Europe 10–18 days on consolidated EU lines. Everything is packed in shock-absorbing foam inside a rigid, water-resistant carton so the housing arrives straight.
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