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Details
| Specification | Value |
|---|---|
| Brand | BorgWarner (Wahler) |
| MPN | 4105.71d |
| Opening Temperature [°C] | 71 °C |
OE numbers (7)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—002 203 39 75
- MERCEDES-BENZ—003 203 29 75
- MERCEDES-BENZ—003 203 32 75
- MERCEDES-BENZ—003 203 74 75
- MERCEDES-BENZ—003 203 79 75
- MERCEDES-BENZ—004 203 84 75
- MERCEDES-BENZ—005 203 28 75
Where this part fits
Original-fit position for OE 0032037475.
What's in the kit
This kit ships with 1 factory-matched components. Each part below is supplied as part of the kit; click any linked MPN to view that component on its own.
| # | Part number | Component | Qty |
|---|---|---|---|
| 1 | 002892 | Gasket, thermostat housing | 1 |
About this product
BorgWarner (Wahler) Thermostat Coolant (4105.71D) 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]: 71 °C, Supplementary Article/Supplementary Info: 35 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 002 203 39 75, 003 203 29 75, 003 203 32 75, 003 203 74 75 and 10 more. Matching these numbers confirms a like-for-like replacement with no loss of function. BorgWarner (Wahler) 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
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (7)
Thermostat Coolant BorgWarner (Wahler) 4105.71D — compatible car models
| Manufacturer article number (MPN) | 4105.71D |
|---|---|
| OE part numbers | 002 203 39 75, 003 203 29 75, 003 203 32 75, 003 203 74 75, 003 203 79 75, 004 203 84 75, 005 203 28 75 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
BorgWarner (Wahler) 4105.71d . Opening Temperature [°C]: 71 °C. Supplementary Article/Supplementary Info: 35
- 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?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Thermostat Coolant fits. All fitment data is verified through TecDoc.
What specifications does this BorgWarner (Wahler) Thermostat Coolant have?
This BorgWarner (Wahler) Thermostat Coolant has the following specifications: Opening Temperature [°C]: 71 °C; Supplementary Article/Supplementary Info: 35. 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: 002 203 39 75, 003 203 29 75, 003 203 32 75, 003 203 74 75, 003 203 79 75, 004 203 84 75, 005 203 28 75. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Coolant cost?
This BorgWarner (Wahler) Thermostat Coolant is available for £14.99. Thermostat Coolant prices vary depending on brand, specifications, and vehicle compatibility. BorgWarner (Wahler) 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 002 203 39 75?
Yes, this BorgWarner (Wahler) Thermostat Coolant is a direct replacement for OE part number 002 203 39 75. 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.
