Womala Thermostat AJ813902 for Jaguar XJ XE
Product Overview
The Thermostat Unit AJ813902 (also referenced as AJ814048) is an OE-grade engine cooling component engineered for the 3.0L V6 supercharged petrol engine in select for Jaguar and for Land Rover vehicles. This complete assembly integrates the thermostat, housing, and integrated temperature sensor into a single unit, regulating coolant flow to maintain optimal engine operating temperature.AJ814048 is the current replacement part, superseding AJ813902, AJ813986, C2Z29980, and C2Z31236.
⚠️ Important: This thermostat unit is specifically for 3.0L V6 supercharged petrol engines — it is not compatible with diesel or other engine variants. Confirm your engine type before ordering.
Key Features
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Complete assembly with sensor — includes thermostat, housing, and integrated temperature sensor
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96°C opening temperature — factory-calibrated for the 3.0L V6 supercharged petrol engine
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OE-grade quality — available as Genuine Jaguar, Wahler, Motorad, Borg & Beck, and other quality alternatives
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Upgraded aluminium version available — replaces failure-prone factory plastic housing for enhanced durability
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Direct-fit replacement — matches factory mounting points and coolant hose connections
OE Cross-Reference
| Primary | Superseded / Interchange | Aftermarket Equivalents |
|---|---|---|
| AJ813902 | AJ814048, AJ813986, C2Z29980, C2Z31236 | Wahler 412482.94 · Motorad 1047-205 / 1047-96 · Borg & Beck BBT573 · Dorman 902-5215 |
???? Supersession Note: AJ814048 is the current replacement part. All listed numbers refer to the same thermostat unit for 3.0L V6 supercharged petrol applications.
Technical Specifications
| Parameter | Detail |
|---|---|
| Part Type | Thermostat Unit / Thermostat Housing Assembly |
| Opening Temperature | 96°C |
| Engine | 3.0L V6 Supercharged Petrol |
| Includes | Thermostat, housing, temperature sensor |
| Housing Material | Plastic (OE) / Aluminium (upgraded) |
| Condition | Brand New, OE-Grade |
Jaguar Applications
| Make | Model | Chassis | Years | Engine |
|---|---|---|---|---|
| for Jaguar | XF | X250 / X260 | 2013 – 2020 | 3.0L V6 SC Petrol |
| for Jaguar | XJ | X351 | 2013 – 2019 | 3.0L V6 SC Petrol |
| for Jaguar | F-TYPE | X152 | 2014 – 2021 | 3.0L V6 SC Petrol |
| for Jaguar | XE | X760 | 2015 – 2019 | 3.0L V6 SC Petrol |
| for Jaguar | F-PACE | X761 | 2017 – 2020 | 3.0L V6 SC Petrol |
Land Rover Applications
| Make | Model | Chassis | Years | Engine |
|---|---|---|---|---|
| for Land Rover | Discovery 4 / LR4 | L319 | 2015 – 2016 | 3.0L V6 SC Petrol |
| for Land Rover | Discovery 5 | L462 | 2017 – 2020 | 3.0L V6 SC Petrol |
| for Land Rover | Range Rover | L405 | 2015 – 2019 | 3.0L V6 SC Petrol |
| for Land Rover | Range Rover Sport | L494 | 2015 – 2019 | 3.0L V6 SC Petrol |
| for Land Rover | Range Rover Velar | L560 | 2018 – 2020 | 3.0L V6 SC Petrol |
VIN Notes: XF Sportbrake (X260) — VIN from JCY73210 to JCY73209; F-PACE 3.0L V6 — from VIN HA000001.
⚠️ Important: This thermostat unit is confirmed for the 3.0L V6 supercharged petrol engine in the models listed above. VIN cut-offs apply on certain applications — confirm your VIN before ordering.
Signs of Failure
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Engine overheating — thermostat stuck closed, restricting coolant flow
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Engine running too cool — thermostat stuck open, preventing proper warm-up
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Coolant leaks — visible drips from the thermostat housing area
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Erratic temperature gauge readings — unstable temperature indication
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Poor fuel economy — engine running below optimal temperature
???? Known Failure Issue: The factory plastic thermostat housing on the 3.0L V6 supercharged petrol engine is prone to cracking and warping under heat and pressure. If not addressed promptly, coolant loss can cause catastrophic engine damage. Upgraded aluminium versions are available for enhanced durability.
Critical – Verify Your VIN Before Ordering
Thermostat units are VIN-, engine-, and model-year-specific. Provide your VIN – our team confirms exact compatibility before dispatch. We cannot accept returns for misordered parts without VIN verification.
???? Installation Tip: Professional installation recommended. When replacing the thermostat, inspect all cooling system hoses and connections for wear. It is recommended to replace the water pump and oil cooler connector at the same time for a complete cooling system service. Refill with OEM-specified coolant at the correct mixture ratio and bleed the cooling system thoroughly to remove air pockets. Consider upgrading to the aluminium version for enhanced durability.
Why Choose Us
|
Advantage |
Detail |
|---|---|
|
Inventory |
10,000+ SKU in stock |
|
Quality |
OE-grade, fully tested |
|
Warranty |
18-month against manufacturing defects |
|
Shipping |
Global via DHL / UPS / FedEx |
|
Flexibility |
Sample orders welcome, low MOQ |
Contact us for bulk orders or VIN‑checked quotes.
Specifications subject to change; images for reference only.Aftermarket replacement – not affiliated with Jaguar Land Rover.
Frequently Asked Questions
A: Signs of a failing bumper bracket include visible damage or deformation, misaligned bumper panels, unusual noises from the front end, or if the bumper appears loose or sagging on one side.
A: For optimal results, we recommend professional installation. Key considerations include ensuring proper alignment of all mounting points, checking for additional damaged components, and verifying all fasteners are properly torqued to specification.
- Extensive Industry Experience: 13 years specializing in Auto Parts auto parts with precise product matching and technical solutions.
- Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
- Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
- Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Womala and Hella.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.