Toyota C-HR Radiator: Specs, Fitment & Common Faults

On the C-HR, a genuinely useful diagnostic pattern: coolant loss specifically at higher speeds points toward a pressure or cap issue.

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OEM Part Number: 164000T371 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 606394 / Valeo 701316

Accuracy note: Covers the Toyota C-HR (2016-) as listed in the UK aftermarket catalogues. Radiators are sold by engine, gearbox and air-conditioning fitment, and one model usually has two or three different cores — a thicker core for diesels and automatics, a thinner one for small petrols — with different hose positions, so a radiator for the wrong engine will not connect up. The references below are UK aftermarket listings whose fitment lists name this generation, labelled by brand with the core size in mm; genuine numbers are those quoted against the listing. Check your engine code and whether the car has air conditioning against your VIN, and replace the coolant and bleed the system after fitting.

Radiators (aftermarket)	Nissens 606394 (675 x 376 x 16 mm, aluminium core with plastic tanks, 1.8 and 2.0 Hybrid); Valeo 701316; Van Wezel 54012701; NRF 550252; Hella 8MK 366 302-891; AKS Dasis 210076N; Nissens 606838 (600 x 358 x 16 mm, with filler cap, 2.0 petrol 3ZR-FAE); NRF 550331
Core sizes & variants	The hybrids take the 675 x 376 x 16 mm radiator shared with the Prius and Corolla Hybrid, which cools the engine circuit only; the inverter has its own separate cooler. The non-hybrid 2.0 takes a smaller 600 x 358 x 16 mm radiator. The 1.2 turbo (8NR-FTS) radiator was not confirmed on these listings.
Genuine (OE) numbers quoted	164000T371; 164000T370; 1640037311; 1640037310; 164000T431 (hybrid); 164000T350 (2.0 petrol)
Fitment notes	Both have 34 mm hose connections. On hybrids, do not confuse the engine radiator with the inverter radiator mounted alongside it, which is a different part.

Accuracy note: genuinely worth knowing: radiator core size and construction can differ between petrol and diesel C-HR engines, and again between manual and automatic gearboxes where the automatic needs an integrated oil cooler circuit — confirm your exact engine code and transmission before ordering.

A Genuinely Useful Diagnostic Pattern Worth Knowing About — Toyota C-HR Radiator

If you're losing coolant specifically through the overflow or header tank pipe, and it seems to happen only at higher speeds, this is genuinely worth understanding: this specific pattern points toward excessive pressure building up in the cooling system, rather than a head gasket issue, particularly if a proper block test has already ruled the head gasket out. A radiator cap that's no longer holding pressure correctly, or a partial blockage somewhere in the system, are both worth checking.

A genuinely useful technical explanation worth knowing about water pump noise: a whining or grinding noise from the water pump area is typically caused by bearing wear, and in more advanced cases, the impeller itself striking the housing once the bearing has failed enough to let it shift position.

It's also worth knowing that coolant leaking specifically from the water pump's shaft seal, visible as a small weep beneath the pump, is often one of the earliest signs of pump failure.

Toyota C-HR Radiator: The Part That Keeps Everything Else From Cooking

This isn't a part anyone gets excited about, but on the Toyota C-HR, overlooked cooling problems are responsible for most serious engine failures that aren't simple wear-and-tear. Catching the early symptoms is about the cheapest insurance available against a major bill later.

Toyota C-HR Radiator: Watch: Replacing It

🎬 Watch: Toyota Prius V Engine Radiator Removal DIY (sister (toyota prius v))

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Weak match: Prius V is not TNGA-C; nothing found on C-HR or Prius Gen4

Before you buy: radiator size and design vary significantly by engine size, transmission type, and whether your car has air conditioning. Always confirm against your VIN before ordering.

Toyota C-HR Radiator: What It Does

Keeping the Toyota C-HR's engine temperature within safe limits comes down to the radiator's job of transferring heat from the coolant into the surrounding air. Automatic-gearbox versions often build in a second circuit for transmission fluid cooling too, which is exactly why fitting the wrong part number can cause two problems, not one.

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Toyota C-HR 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 Toyota Radiator

The same part, covered across other Toyota models.