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Details
| Specification | Value |
|---|---|
| Brand | WALKER |
| Category | catalyst converter |
| Length [mm] | 385 mm |
| Weight [kg] | 7,500 kg |
OE/OEM numbers (21)
Where this part fits
Original-fit position for OE 55555948. The red ring marks where this part installs on the vehicle.
About this product
The WALKER catalyst converter (20854) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Length [mm]: 385 mm, Weight [kg]: Ceramic, 500 kg, Code Letter: 91, Supplementary Article/Info 2: 515, Supplementary Article/Info 2: 494. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit OPEL, SAAB, VAUXHALL models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 04.3783, 04.3790, 04.3890, 08.010.60 and 62 more. Matching these numbers confirms a like-for-like replacement with no loss of function. WALKER is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
About WALKER
Walker, part of the Tenneco group, is a well-established manufacturer of exhaust system components with decades of engineering experience. Walker specialises in catalytic converters, diesel particulate filters, exhaust pipes, silencers, and flexible connectors. As a supplier meeting strict European emission regulations, Walker products are designed for precise fitment and optimal exhaust gas treatment. With extensive vehicle coverage and products engineered to restore factory exhaust performance, Walker is a dependable choice for exhaust system repairs across all major European vehicle brands.
Suitable cars
Equivalent products (50)
Show all 50 OE numbers
catalyst converter WALKER 20854 — compatible car models
| Car models | OPEL: ASTRA G Convertible (T98), ASTRA G Coupe (T98), ASTRA G Estate (T98), ASTRA G Estate Van (F70), ASTRA G Hatchback (T98), ASTRA G Saloon (T98), ASTRA H (A04), ASTRA H Estate (A04), ASTRA H GTC (A04), ASTRA H TwinTop (A04) (+11 more); SAAB: 9-3 Convertible (YS3F), 9-3 Estate (E50), 9-3 (YS3F, E79, D79, D75); VAUXHALL: ASTRA Mk IV (G) Convertible (T98), ASTRA Mk IV (G) Coupe (T98), ASTRA Mk IV (G) Estate (T98), ASTRA Mk IV (G) Hatchback (T98), ASTRA Mk IV (G) Saloon (T98), ASTRA Mk V (H) (A04) |
|---|---|
| Engines | 1.8 16V (F67); 1.8 16V (F07); 1.8 16V (F35); 1.6 (F70); 1.8 16V (F08, F48); 1.8 16V (F69); 1.8 (L48); 1.8 (L35); 1.8 (L08); 1.8 (L67); 1.8 (F08, F68); 1.8 (E75); 1.8 (F48); 1.8 (R97); 1.8 i 16V (F35) (+8 more) |
| Year of manufacture | 1995-2015 |
| Manufacturer article number (MPN) | 20854 |
| OE part numbers | 13106577, 13106942, 55555948, 55556533, 55560958, 5849005, 5849015, 5849020, 5849044, 849178, 850062, 850215, 850303, 9158633, 9158733, 95507207, R1620102, R1620137, R1620144, R1620150 (+1 more) |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
WALKER 20854 catalyst converter. Code Letter: 91. Guarantee: 3. Length [mm]: 385 mm. Supplementary Article/Info 2: 494. Supplementary Article/Info 2: 515. Weight [kg]: 7,500 kg
- 1x catalyst converter
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this catalyst converter compatible with my car?
This catalyst converter fits OPEL, SAAB, VAUXHALL vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this WALKER catalyst converter have?
This WALKER catalyst converter has the following specifications: Length [mm]: 385 mm; Weight [kg]: 7,500 kg; Code Letter: 91; Supplementary Article/Info 2: 515; Supplementary Article/Info 2: 494; Guarantee: 3. Check the full specifications table above for complete details.
What OE part numbers does this catalyst converter replace?
This catalyst converter replaces OE part numbers: 13106577, 13106942, 55555948, 55556533, 55560958, 5849005, 5849015, 5849020 and 13 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a catalyst converter cost?
This WALKER catalyst converter is available for £436.99. Catalyst converter prices vary depending on brand, specifications, and vehicle compatibility. WALKER parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my catalyst converter?
Regular inspection of your catalyst converter is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a catalyst converter?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the catalyst converter fitted by a professional mechanic.
Can I use this part as a replacement for OE 13106577?
Yes, this WALKER catalyst converter is a direct replacement for OE part number 13106577. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the WALKER 20854 the same as the WALKER 15870?
No, while both are catalyst converter parts, they are different products. The WALKER 20854 has Length [mm]: 385 mm, Weight [kg]: 7,500 kg, Code Letter: 91. The WALKER 15870 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
