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Details
| Specification | Value |
|---|---|
| Brand | STC |
| MPN | t403540 |
| Weight [kg] | 0,009 kg |
| Weight [kg] | 0,038 kg |
| Weight [g] | 9 g |
OE numbers (2)
Search by this OE number to find compatible parts
- VW—025 121 142
- VW—357 121 140
Where this part fits
Original-fit position for OE 025121142. The red ring marks where this part installs on the vehicle.
About this product
STC Sealing Plug Coolant Flange (T403540) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Weight [kg]: 0, 009 kg, Weight [kg]: 0, 038 kg, Required quantity: Steel, Weight [g]: Stainless Steel g — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. 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: 025 121 142, 03540, 1114550310, 116181 and 13 more. Matching these numbers confirms a like-for-like replacement with no loss of function. STC 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (15)
Sealing Plug Coolant Flange STC T403540 — compatible car models
| Car models | AUDI: 100 C3 Avant (445, 446), 100 C3 Saloon (443, 444), 100 C4 Avant (4A5), 100 C4 Saloon (4A2), 80 B2 Saloon (811, 813, 814, 819, 853), 80 B3 Saloon (893, 894, 8A2), 90 B2 (813, 814, 853), 90 B3 (893, 894, 8A2), COUPE B2 (81, 855, 856), COUPE B3 (89, 8B3); VW: CADDY I (14), CADDY II Box Body/MPV (9K9A), CADDY II MPV (9K9B), CADDY II Pickup (9U7), CORRADO (53I), GOLF I (17), GOLF II (19E, 1G1), GOLF III (1H1), GOLF III Cabriolet (1E7), GOLF III Variant (1H5) (+10 more) |
|---|---|
| Engines | 1.8; 2.0 E; 2.0; 1.3; 1.4; 1.6 TD; 1.6; 1.5; 1.8 16V; 1.1; 1.0 |
| Year of manufacture | 1974-2008 |
| Manufacturer article number (MPN) | T403540 |
| OE part numbers | 025 121 142, 357 121 140 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
STC t403540 . Required quantity: 1. Weight [g]: 9 g. Weight [kg]: 0,009 kg. Weight [kg]: 0,038 kg
- 1x Sealing Plug Coolant Flange
Shipping, returns, warranty
Free UK delivery on orders over £50.00. Tracked standard shipping.
- Standard delivery: 4–8 business days
- Order before 5pm — ships the next working day
- 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 Sealing Plug Coolant Flange compatible with my car?
This Sealing Plug Coolant Flange 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 STC Sealing Plug Coolant Flange have?
This STC Sealing Plug Coolant Flange has the following specifications: Weight [kg]: 0,009 kg; Weight [kg]: 0,038 kg; Required quantity: 1; Weight [g]: 9 g. Check the full specifications table above for complete details.
What OE part numbers does this Sealing Plug Coolant Flange replace?
This Sealing Plug Coolant Flange replaces OE part numbers: 025 121 142, 357 121 140. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Sealing Plug Coolant Flange cost?
Sealing Plug Coolant Flange prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this STC Sealing Plug Coolant Flange. All parts come with our 14-day money-back guarantee.
How do I know when to replace my Sealing Plug Coolant Flange?
Regular inspection of your Sealing Plug Coolant Flange 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 Sealing Plug Coolant Flange?
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 Sealing Plug Coolant Flange fitted by a professional mechanic.
Can I use this part as a replacement for OE 025 121 142?
Yes, this STC Sealing Plug Coolant Flange is a direct replacement for OE part number 025 121 142. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
