Kia Sorento Radiator: Specs, Fitment & Common Faults
On the Sorento, a radiator, thermostat, and housing were all replaced, yet the coolant smell genuinely persisted, pointing toward the heater core.
Illustration for editorial purposes
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OEM Part Number: 25310C5270 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 666223 / NRF 59363
| Radiators (aftermarket) | Nissens 666223 (510 x 484 x 32 mm, soldered aluminium core, plastic tanks, fits 2.2 CRDi 197/200 PS D4HB, 2WD and 4WD); NRF 59363; Van Wezel 82012714. |
|---|---|
| Core sizes & variants | One 32 mm deep core covers all UK 2.2 CRDi models, manual and automatic; hose connections are 35.5 mm. |
| Genuine (OE) numbers quoted | 25310C5270 |
| Fitment notes | Nissens also lists 666222 for the same model, which suits other market engines. |
A Genuinely Honest Account Worth Knowing If the Smell Persists — Kia Sorento Radiator
This is genuinely worth knowing if you're chasing a coolant smell that won't go away: one documented case on a related model saw the radiator, thermostat, and thermostat housing all replaced in turn, with the car not overheating, yet the smell of coolant persisted after driving. If you've replaced the obvious components and the smell remains, it's genuinely worth having the heater core checked specifically.
It's also worth knowing that the thermostat housing sits toward the front of the engine, higher up than where normal AC condensation would appear.
Kia Sorento Radiator: The Part That Keeps Everything Else From Cooking
Unglamorous as it is, the Kia Sorento's cooling system sits behind nearly every serious engine failure that isn't just ordinary wear — and one that went unaddressed for too long. Noticing early warning signs here is a small cost against a potentially very large one.
Kia Sorento Radiator: Watch: Replacing It
Generation not stated in title; covers the integrated transmission cooler failure, check it is the UM 2015-2020 car.
Kia Sorento Radiator: What It Does
On the Kia Sorento, engine coolant sheds its heat into the passing air via the radiator, which is what keeps engine temperature in a safe working range. On automatics, it frequently pulls double duty cooling the transmission fluid through its own internal circuit — a detail that makes getting the exact part number right especially important.
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Kia Sorento Radiator: Faults, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Radiator Guide for the three common failure modes, confirming fitment against your VIN, and OEM vs aftermarket guidance.
More Kia Radiator
The same part, covered across other Kia models.