- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | CALORSTAT by Vernet |
| MPN | th7171.87j |
| Opening Temperature [°C] | 87 °C |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
Show all 2 OE numbers
- AUDI / VW—03C121111D
- AUDI / VW—03C121111G
About this product
The CALORSTAT by Vernet Thermostat Coolant (TH7171.87J) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Opening Temperature [°C]: 87 °C, Supplementary Article/Supplementary Info: 35, Supplementary Article/Info 2: Nylon, Housing material: Plastic. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 03C121111D, 03C121111G, 111138, TH701K1. Matching these numbers confirms a like-for-like replacement with no loss of function. CALORSTAT by Vernet 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.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (2)
Thermostat Coolant CALORSTAT by Vernet TH7171.87J — compatible car models
| Manufacturer article number (MPN) | TH7171.87J |
|---|---|
| OE part numbers | 03C121111D, 03C121111G |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
CALORSTAT by Vernet th7171.87j . Housing material: 6. Opening Temperature [°C]: 87 °C. Supplementary Article/Info 2: 14. Supplementary Article/Supplementary Info: 35
- 1x Thermostat Coolant
Shipping, returns, warranty
Free UK delivery on orders over £99. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 30 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 30-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 CALORSTAT by Vernet Thermostat Coolant have?
This CALORSTAT by Vernet Thermostat Coolant has the following specifications: Opening Temperature [°C]: 87 °C; 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: 03C121111D, 03C121111G. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Thermostat Coolant cost?
This CALORSTAT by Vernet Thermostat Coolant is available for £77.99. Thermostat Coolant prices vary depending on brand, specifications, and vehicle compatibility. CALORSTAT by Vernet parts offer a balance of quality and value, backed by our 30-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 03C121111D?
Yes, this CALORSTAT by Vernet Thermostat Coolant is a direct replacement for OE part number 03C121111D. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
