Jaguar XJ X351 pre-facelift water cooler radiator
The Jaguar XJ (X351) pre-facelift (2010–2015) water cooler radiator is a critical component that varies significantly depending on your engine (3.0L Diesel, 3.0L Supercharged V6, or 5.0L V8). For this generation, Jaguar used a modular cooling pack where the main radiator is often sandwiched with the A/C condenser and, on supercharged models, a charge air cooler.
1. Key Part Numbers & Identification
Identifying the correct radiator is best done via your VIN, but common engineering and OEM codes for the pre-facelift era include:
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C2D38735: Common for 3.0L and 5.0L Supercharged models.
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C2C36506: Often used for early 3.0L V6 Petrol and 4.2L/5.0L Naturally Aspirated variants.
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9X23-8005-BE: A common engineering number found on the radiator’s sticker/stamping for 2010–2014 models.
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C2D38733: Typically associated with the 3.0L Diesel (AJD-V6) models.
2. Market Options (Early 2026)
Because the X351 is an all-aluminum luxury sedan, OEM parts are expensive. Most owners choose high-quality aftermarket alternatives from established cooling specialists.
| Brand | Estimated Price (USD) | Notes |
| Nissens | $220 – $310 | Very common high-quality aftermarket choice. |
| Mahle / Behr | $280 – $380 | Often the Original Equipment (OE) manufacturer for Jaguar. |
| Used (OEM) | $150 – $250 | Risk of internal scaling; ensure it was pressure tested. |
| Jaguar Genuine | $650 – $900+ | Available through JLR Heritage or authorized dealers. |
3. Critical Installation Notes
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The “Sandwich” Design: Replacing the radiator on an X351 is labor-intensive because it is part of a cooling module. You must carefully disconnect the A/C condenser and (if applicable) the intercooler without damaging their fragile aluminum fins.
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Plastic “T-Piece” Warning: While the radiator itself can leak at the plastic end tanks, a very common “false radiator leak” on the X351 is actually the plastic coolant T-piece (outlet pipe) or the water pump. These fail far more frequently than the radiator core.
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Coolant Type: You must use Orange (OAT) coolant meeting specification WSS-M97B44-D. Mixing this with green or blue coolant will cause “gel” to form, which can clog the new radiator.
4. Auxiliary Radiators
If your XJ is a Supercharged (V6 or V8) model, it likely has auxiliary radiators located behind the left and right side mesh grilles in the front bumper. If you have a leak in the corners of the car, it may be an auxiliary unit rather than the main center water radiator.
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