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Details
| Specification | Value |
|---|---|
| Brand | BorgWarner (Wahler) |
| MPN | 4637.82d |
| Opening Temperature [°C] | 82 °C |
| Diameter [mm] | 55 mm |
OE numbers (11)
Where this part fits
Original-fit position for OE MD165630.
About this product
BorgWarner (Wahler) Thermostat Coolant (4637.82D) 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]: 82 °C, Diameter [mm]: 55 mm, Supplementary Article/Supplementary Info: 35 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with MITSUBISHI, PROTON, VOLVO 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: 299-82, 30874021, 30875350, 322-82 and 21 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
Equivalent products (14)
Thermostat Coolant BorgWarner (Wahler) 4637.82D — compatible car models
| Car models | MITSUBISHI: CARISMA (DA), CARISMA Saloon (DA), COLT CZC VI Convertible (RG), COLT IV (CAA), COLT V (CJ, CP), COLT VI (Z3A, Z2A), ECLIPSE II (D3A), GALANT IX Saloon (DJ, ED, EF), GALANT VII (E5A, E7A, E8A), GALANT VIII (EA) (+20 more) |
|---|---|
| Engines | 1.6 (DA1A); 1.5 Turbo (Z37A); 1.6 4WD (CC4A); 1300 GL,GLX (CJ1A); 1.5 CZT (Z37A); 2000 GT 16V; 2.4; 1.8 (E52A); 1.8 GDi (EA1A); 2.0 (EA2W); 2.4 GDi GLX 4WD (N94W); 2.4 MIVEC (NA4W); 2.0 (K62T); 2.0 (P13T); 2.0 (P03V, P13V) (+13 more) |
| Year of manufacture | 1986-2013 |
| Manufacturer article number (MPN) | 4637.82D |
| OE part numbers | 30874021, 30875350, MD 158570, MD 165630, MD 175746, MD 310106, MD 315301, MD 335170, MD 337408, MD 338234, MD 360320 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
BorgWarner (Wahler) 4637.82d . Diameter [mm]: 55 mm. Opening Temperature [°C]: 82 °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?
This Thermostat Coolant fits MITSUBISHI, PROTON, VOLVO 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 BorgWarner (Wahler) Thermostat Coolant have?
This BorgWarner (Wahler) Thermostat Coolant has the following specifications: Opening Temperature [°C]: 82 °C; Diameter [mm]: 55 mm; 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: 30874021, 30875350, MD 158570, MD 165630, MD 175746, MD 310106, MD 315301, MD 335170 and 3 more. 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 £38.99. 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 30874021?
Yes, this BorgWarner (Wahler) Thermostat Coolant is a direct replacement for OE part number 30874021. 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.
