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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Opening Temperature [°C] | 87 °C |
| Weight [kg] | 0,056 kg |
| Outer Diameter [mm] | 34 mm |
OE numbers (10)
Search by this OE number to find compatible parts
- SEAT / SKODA / VW—03C 121 026 M
- SEAT / SKODA / VW—03C 121 110 AA
- SEAT / SKODA / VW—03C 121 110 J
- SEAT / SKODA / VW—03C 121 111 AE
- SEAT / SKODA / VW—03C 121 111 AE SK
- SEAT / VW—03C 121 111 M
- SEAT / SKODA / VW—3C 121 026 M
- SEAT / SKODA / VW—3C 121 110 AA
- SEAT / SKODA / VW—3C 121 110 J
- SEAT / VW—3C 121 111 M
Where this part fits
Original-fit position for OE 03C121110J. The red ring marks where this part installs on the vehicle.
About this product
When thermostat coolant performance matters, the FEBI BILSTEIN 109021 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Opening Temperature [°C]: 87 °C, Weight [kg]: 0, 056 kg, Outer Diameter [mm]: 34 mm, Supplementary Article/Info 2: 396. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with SEAT, 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: 001-10-29977, 01681, 03C 121 026 M, 03C 121 110 AA and 143 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.
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 (147)
Show all 147 OE numbers
Thermostat Coolant FEBI BILSTEIN 109021 — compatible car models
| Car models | SEAT: IBIZA IV (6J5, 6P1), IBIZA IV SC (6J1, 6P5), IBIZA IV ST (6J8, 6P8); VW: POLO IV (9N, 9A), POLO V (6R1, 6C1), POLO Van V (6R1, 6C1), POLO VIVO Hatchback (6S1, 6S3), POLO VIVO Saloon (6S2, 6S4), POLO V Saloon (602, 604, 612, 614) |
|---|---|
| Engines | 1.6; 1.6 16V; 1.4 (6R1); 1.4 |
| Year of manufacture | 2001-2022 |
| Manufacturer article number (MPN) | 109021 |
| OE part numbers | 03C 121 026 M, 03C 121 110 AA, 03C 121 110 J, 03C 121 111 AE, 03C 121 111 AE SK, 03C 121 111 M, 3C 121 026 M, 3C 121 110 AA, 3C 121 110 J, 3C 121 111 M |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 109021 . Opening Temperature [°C]: 87 °C. Outer Diameter [mm]: 34 mm. Supplementary Article/Info 2: 396. Weight [kg]: 0,056 kg
- 1x Thermostat Coolant
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 Coolant compatible with my car?
This Thermostat Coolant fits SEAT, 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 Coolant have?
This FEBI BILSTEIN Thermostat Coolant has the following specifications: Opening Temperature [°C]: 87 °C; Weight [kg]: 0,056 kg; Outer Diameter [mm]: 34 mm; Supplementary Article/Info 2: 396. Check the full specifications table above for complete details.
What OE part numbers does this Thermostat Coolant replace?
This Thermostat Coolant replaces OE part numbers: 03C 121 026 M, 03C 121 110 AA, 03C 121 110 J, 03C 121 111 AE, 03C 121 111 AE SK, 03C 121 111 M, 3C 121 026 M, 3C 121 110 AA and 2 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Coolant cost?
This FEBI BILSTEIN Thermostat Coolant is available for £20.99. Thermostat Coolant 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 Coolant?
Symptoms include engine overheating, heater not producing warm air, temperature gauge fluctuations, or coolant leaks near the thermostat housing.
What tools do I need to replace a Thermostat Coolant?
Tools needed: hose clamp pliers, 8-10mm socket, torque wrench, drain pan, new coolant. Difficulty: Moderate DIY. Safety warning: Never open the cooling system on a warm or hot engine -- coolant is under pressure and causes scalding. Always use the correct coolant specification to avoid corrosion with aluminium engine components.
Can I use this part as a replacement for OE 03C 121 026 M?
Yes, this FEBI BILSTEIN Thermostat Coolant is a direct replacement for OE part number 03C 121 026 M. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
