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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Opening Temperature [°C] | 87 °C |
| Weight [kg] | 0,299 kg |
OE numbers (2)
Search by this OE number to find compatible parts
- AUDI / SEAT / SKODA / VW—03L 121 111 AE
- AUDI / SEAT / SKODA / VW—3L 121 111 AE
Where this part fits
Original-fit position for OE 03L121111AE. The red ring marks where this part installs on the vehicle.
About this product
Sourced from FEBI BILSTEIN, this thermostat housing (39226) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Opening Temperature [°C]: 87 °C, Weight [kg]: 0, 299 kg, Supplementary Article/Info 2: 396 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. 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: 001-10-32135, 03L 121 111 AE, 045241N, 053-025-0035 and 127 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FEBI BILSTEIN 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.
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.
About FEBI BILSTEIN
febi bilstein, founded in 1844 in Ennepetal, Germany, is one of the oldest and most comprehensive automotive parts suppliers in the independent aftermarket. febi bilstein offers over 40,000 parts spanning steering, suspension, engine, braking, cooling, and electrical systems. Certified to IATF 16949 and supplying OE-quality components, febi bilstein products undergo rigorous testing to match original equipment performance. With nearly 180 years of German engineering tradition, febi bilstein is the go-to brand for reliable, competitively priced replacement parts.
Suitable cars
Equivalent products (137)
Show all 137 OE numbers
Thermostat Housing FEBI BILSTEIN 39226 — compatible car models
| Car models | AUDI: A1 (8X1, 8XK), A1 Sportback (8XA, 8XF), A3 (8P1), A3 Convertible (8P7), A3 Sportback (8PA), Q3 (8UB, 8UG), TT (8J3), TT Roadster (8J9); SEAT: ALHAMBRA (710, 711), ALTEA (5P1), ALTEA XL (5P5, 5P8), IBIZA IV (6J5, 6P1), IBIZA IV SC (6J1, 6P5), LEON (1P1); SKODA: OCTAVIA II (1Z3), OCTAVIA II Combi (1Z5), SUPERB II (3T4), SUPERB II Estate (3T5), YETI (5L); VW: AMEO (631), 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), CADDY IV MPV (SAB, SAJ), CC B7 (358) (+1 more) |
|---|---|
| Engines | 2.0 TDI; 2.0 TDI quattro; 2.0 TDI 16V; 1.2; 1.6 TDI |
| Year of manufacture | 2003-2022 |
| Manufacturer article number (MPN) | 39226 |
| OE part numbers | 03L 121 111 AE, 3L 121 111 AE |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 39226 . Opening Temperature [°C]: 87 °C. Supplementary Article/Info 2: 396. Weight [kg]: 0,299 kg
- 1x Thermostat Housing
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 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 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 FEBI BILSTEIN Thermostat Housing have?
This FEBI BILSTEIN Thermostat Housing has the following specifications: Opening Temperature [°C]: 87 °C; Weight [kg]: 0,299 kg; Supplementary Article/Info 2: 396. 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: 03L 121 111 AE, 3L 121 111 AE. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Housing cost?
This FEBI BILSTEIN Thermostat Housing is available for £49.99. Thermostat Housing prices vary depending on brand, specifications, and vehicle compatibility. FEBI BILSTEIN 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 03L 121 111 AE?
Yes, this FEBI BILSTEIN Thermostat Housing is a direct replacement for OE part number 03L 121 111 AE. 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 FEBI BILSTEIN 39226 the same as the FEBI BILSTEIN 105887?
No, while both are Thermostat Housing parts, they are different products. The FEBI BILSTEIN 39226 has Opening Temperature [°C]: 87 °C, Weight [kg]: 0,299 kg, Supplementary Article/Info 2: 396. The FEBI BILSTEIN 105887 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.
