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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Opening Temperature [°C] | 100 °C |
OE/OEM numbers (5)
Search by this OE number to find compatible parts
- AUDI / VW—06B 121 111B
- AUDI / VW—06B 121 111D
- AUDI / VW—06B 121 111G
- AUDI / VW—06B 121 111H
- AUDI / VW—06B 121 111K
Where this part fits
Original-fit position for OE 06B121111D. The red ring marks where this part installs on the vehicle.
About this product
TOPRAN Thermostat Coolant (109 891) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Opening Temperature [°C]: 100 °C, Housing Type: 0, Supplementary Article/Supplementary Info: 35, Supplementary Article/Info 2: Nylon, Housing material: Plastic — 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: 001-10-21446, 003-025-0001, 045053N, 06B 121 111B and 123 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN 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.
About TOPRAN
TOPRAN, part of the Hans Thomsen Group headquartered in Hamburg, Germany, is a growing independent aftermarket brand focused on providing quality parts at accessible prices. TOPRAN offers a comprehensive range covering engine, cooling, electrical, braking, and body components for European vehicles. All TOPRAN products are manufactured to meet OE specifications and undergo quality testing before distribution. Combining German quality management with competitive pricing, TOPRAN is an excellent choice for cost-conscious motorists and workshops who do not want to compromise on part quality.
Suitable cars
Equivalent products (131)
Show all 131 OE numbers
Thermostat Coolant TOPRAN 109 891 — compatible car models
| Car models | AUDI: A4 B6 (8E2), A4 B6 Avant (8E5), A4 B7 (8EC), A4 B7 Avant (8ED), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6); VW: PASSAT B5.5 (3B3), PASSAT B5.5 Variant (3B6) |
|---|---|
| Engines | 1.8 T; 2.0 |
| Year of manufacture | 1997-2009 |
| Manufacturer article number (MPN) | 109 891 |
| OE part numbers | 06B 121 111B, 06B 121 111D, 06B 121 111G, 06B 121 111H, 06B 121 111K |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 109891 . Housing material: 6. Housing Type: 0. Opening Temperature [°C]: 100 °C. Supplementary Article/Info 2: 14. Supplementary Article/Supplementary Info: 35
- 1x Thermostat Coolant
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 Coolant compatible with my car?
This Thermostat Coolant 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 TOPRAN Thermostat Coolant have?
This TOPRAN Thermostat Coolant has the following specifications: Opening Temperature [°C]: 100 °C; Housing Type: 0; Supplementary Article/Supplementary Info: 35; Supplementary Article/Info 2: 14; Housing material: 6. 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: 06B 121 111B, 06B 121 111D, 06B 121 111G, 06B 121 111H, 06B 121 111K. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Coolant cost?
This TOPRAN Thermostat Coolant is available for £59.99. Thermostat Coolant prices vary depending on brand, specifications, and vehicle compatibility. TOPRAN 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 06B 121 111B?
Yes, this TOPRAN Thermostat Coolant is a direct replacement for OE part number 06B 121 111B. 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.
