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Details
| Specification | Value |
|---|---|
| Brand | VEMO |
| MPN | v15-99-2045 |
| Opening Temperature [°C] | 92 °C |
OE/OEM numbers (6)
Search by this OE number to find compatible parts
- AUDI—03L121111AJ
- AUDI—03L121111AN
- AUDI / SEAT / SKODA / VAG / VW—03L 121 111 R
- AUDI / SEAT / SKODA / VAG / VW—03L 121 111 S
- AUDI / SEAT / SKODA / VW—3L 121 111 R
- AUDI / SEAT / SKODA / VAG / VW—3L 121 111 S
Where this part fits
Original-fit position for OE 03L121111R. The red ring marks where this part installs on the vehicle.
About this product
The VEMO Thermostat Housing (V15-99-2045) 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: Opening Temperature [°C]: 92 °C. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit AUDI, SEAT, SKODA, VW 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: 03L121111AJ, 03L121111AN, 03L 121 111 R, 03L 121 111 S and 26 more. Matching these numbers confirms a like-for-like replacement with no loss of function. VEMO 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.
Thermostat Housing buying guide
Why replace this part?
The thermostat housing holds the thermostat and routes coolant between the engine and radiator. Plastic housings are prone to cracking with heat cycling, causing sudden coolant loss and rapid overheating.
Signs you need a replacement
- Coolant leak at the top of the engine near the thermostat
- rapid coolant loss
- white steam from under the bonnet
- engine temperature swings
- puddles of coolant after the engine warms up
When to replace
No fixed interval — plastic housings typically last 80,000–120,000 miles before cracking. Replace at first sign of leakage.
Suitable cars
Equivalent products (25)
Show all 25 OE numbers
Thermostat Housing VEMO V15-99-2045 — compatible car models
| Car models | AUDI: A1 (8X1, 8XK), A1 Sportback (8XA, 8XF), A3 (8P1), A3 Convertible (8P7), A3 Sportback (8PA); SEAT: ALTEA (5P1), ALTEA XL (5P5, 5P8), IBIZA IV (6J5, 6P1), IBIZA IV Hatchback Van (6J1), IBIZA IV SC (6J1, 6P5), IBIZA IV ST (6J8, 6P8), LEON (1P1), TOLEDO IV (KG3); SKODA: FABIA II Combi (545), OCTAVIA II (1Z3), OCTAVIA II Combi (1Z5), RAPID (NH3, NK3, NK6), RAPID Spaceback (NH1), ROOMSTER (5J7), ROOMSTER Praktik (5J), SUPERB II (3T4), SUPERB II Estate (3T5), YETI (5L); VW: BEETLE (5C1, 5C2), BEETLE Convertible (5C7, 5C8), CADDY ALLTRACK IV Box Body/MPV (SAA), CADDY ALLTRACK IV MPV (SAB), CADDY III Box Body/MPV (2KA, 2KH, 2CA, 2CH), CADDY III MPV (2KB, 2KJ, 2CB, 2CJ), CADDY IV Box Body/MPV (SAA, SAH) |
|---|---|
| Engines | 1.6 TDI |
| Year of manufacture | 2003-2022 |
| Manufacturer article number (MPN) | V15-99-2045 |
| OE part numbers | 03L121111AJ, 03L121111AN, 03L 121 111 R, 03L 121 111 S, 3L 121 111 R, 3L 121 111 S |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
VEMO v15-99-2045 EXPERT KITS +. Opening Temperature [°C]: 92 °C
- 1x Thermostat Housing
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 Thermostat Housing compatible with my car?
This Thermostat Housing fits AUDI, SEAT, SKODA, 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 VEMO Thermostat Housing have?
This VEMO Thermostat Housing has the following specifications: Opening Temperature [°C]: 92 °C. Check the full specifications table above for complete details.
What OE part numbers does this Thermostat Housing replace?
This Thermostat Housing replaces OE part numbers: 03L121111AJ, 03L121111AN, 03L 121 111 R, 03L 121 111 S, 3L 121 111 R, 3L 121 111 S. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Housing cost?
This VEMO Thermostat Housing is available for £51.99. Thermostat Housing prices vary depending on brand, specifications, and vehicle compatibility. VEMO parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Thermostat Housing?
Regular inspection of your Thermostat Housing 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 Thermostat Housing?
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 Thermostat Housing fitted by a professional mechanic.
Can I use this part as a replacement for OE 03L121111AJ?
Yes, this VEMO Thermostat Housing is a direct replacement for OE part number 03L121111AJ. 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 VEMO V15-99-2045 the same as the VEMO V10-99-0017?
No, while both are Thermostat Housing parts, they are different products. The VEMO V15-99-2045 has Opening Temperature [°C]: 92 °C. The VEMO V10-99-0017 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.
