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Details
| Specification | Value |
|---|---|
| Brand | MERTZ |
| MPN | m-s4503 |
| Fitting Position | Bottom |
| Thickness [mm] | 15.0 mm |
| External Thread [mm] | M8x1.25 mm |
| Outer Diameter [mm] | 30.0 mm |
OE/OEM numbers (7)
Search by this OE number to find compatible parts
- AUDI / VW—058 129 631 A
- AUDI / VW—068 121 275
- AUDI / VW—58 129 631 A
- AUDI / VW—68 121 275
- AUDI / VW—803 121 273
- AUDI / VW—ZBA 121 273
- AUDI / VW—ZBA 121 275
Where this part fits
Original-fit position for OE 803121273. The red ring marks where this part installs on the vehicle.
About this product
When mounting radiator performance matters, the MERTZ M-S4503 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Fitting Position: U, Thickness [mm]: EPDM, 0 mm, External Thread [mm]: M8x1, 25 mm, Material: 43, Outer Diameter [mm]: 30, 0 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with AUDI, VW vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 01509, 02785, 058 129 631 A, 068 121 275 and 30 more. Matching these numbers confirms a like-for-like replacement with no loss of function. MERTZ 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.
Suitable cars
Equivalent products (26)
Show all 26 OE numbers
Mounting Radiator MERTZ M-S4503 — compatible car models
| Car models | AUDI: 100 C2 Avant (435, 436), 100 C2 Saloon (431, 433, 434), 100 C3 Avant (445, 446), 100 C3 Saloon (443, 444), 80 B1 Saloon (80, 82), 80 B2 Saloon (811, 813, 814, 819, 853), 80 B3 Saloon (893, 894, 8A2), 80 B4 Avant (8C5), 80 B4 Saloon (8C2), 90 B2 (813, 814, 853) (+3 more); VW: PASSAT B1 (32), PASSAT B1 Variant (33), PASSAT B2 (32B), TRANSPORTER T1 Bus (22, 24, 25, 28), TRANSPORTER T2 Bus (22, 23, 24), TRANSPORTER T3 Bus (25), TRANSPORTER T3 Platform/Chassis (24), TRANSPORTER T3 Van (24, 25) |
|---|---|
| Engines | 1.6; 1.8; 1.3; 1.4; 1.6 E; 1.6 TD; 1.1 (44593); 1.6 D |
| Year of manufacture | 1950-2003 |
| Manufacturer article number (MPN) | M-S4503 |
| OE part numbers | 058 129 631 A, 068 121 275, 58 129 631 A, 68 121 275, 803 121 273, ZBA 121 273, ZBA 121 275 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
MERTZ m-s4503 . External Thread [mm]: M8x1,25 mm. Fitting Position: U. Material: 43. Outer Diameter [mm]: 30,0 mm. Thickness [mm]: 15,0 mm
- 1x Mounting Radiator
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 Mounting Radiator compatible with my car?
This Mounting Radiator fits AUDI, VW 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 MERTZ Mounting Radiator have?
This MERTZ Mounting Radiator has the following specifications: Fitting Position: U; Thickness [mm]: 15,0 mm; External Thread [mm]: M8x1,25 mm; Material: 43; Outer Diameter [mm]: 30,0 mm. Check the full specifications table above for complete details.
What OE part numbers does this Mounting Radiator replace?
This Mounting Radiator replaces OE part numbers: 058 129 631 A, 068 121 275, 58 129 631 A, 68 121 275, 803 121 273, ZBA 121 273, ZBA 121 275. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Mounting Radiator cost?
This MERTZ Mounting Radiator is available for £1.99. Mounting Radiator prices vary depending on brand, specifications, and vehicle compatibility. MERTZ parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Mounting Radiator?
Regular inspection of your Mounting Radiator 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 Mounting Radiator?
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 Mounting Radiator fitted by a professional mechanic.
Can I use this part as a replacement for OE 058 129 631 A?
Yes, this MERTZ Mounting Radiator is a direct replacement for OE part number 058 129 631 A. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
