Volkswagen Touran Radiator: Specs, Fitment & Common Faults
If your Touran has an EA888 TSI engine, VW has legally admitted to using "inferior thermoplastic materials" in the water pump housing — a real class-action settlement covers this.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — radiators (aftermarket) Nissens 65306 / Valeo 735548
| Radiators (aftermarket) | Nissens 65306 (618 x 397 x 16 mm, without sealing cap, without expansion tank, without gasket/seal); Nissens 64106 (647 x 310 x 22 mm, without sealing cap, without gasket/seal); Nissens 65302 (600 x 425 x 26 mm); Valeo 735548 (650 x 449 x 34 mm, for vehicles without oil cooler); Valeo 735558 (650 x 411 x 24 mm, for vehicles without oil cooler); Valeo 735557 (650 x 322 x 24 mm, for vehicles without oil cooler); NRF 50042 (620 x 410 x 26 mm) |
|---|---|
| Core sizes & variants | MQB radiator; the 1.2/1.4/1.5 TSI petrols take a 24 mm core and the 1.6/2.0 TDI diesels and DSG cars the deeper 34 mm core. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order a genuine unit against your VIN |
| Fitment notes | Same family as the Golf VII and Tiguan II; quote the engine code and gearbox when ordering. |
Confirmed: A Genuinely Serious, Class-Action-Level Design Flaw on TSI Engines — Volkswagen Touran Radiator
If your car has a TSI turbo petrol engine (particularly the EA888 family used across much of VW's range from around 2015 onward), this is genuinely the single most important thing to know before anything else on this page. The water pump and thermostat are combined into one integrated plastic housing, and this plastic becomes brittle and develops hairline cracks after thousands of ordinary heat cycles — leading to a coolant leak that's often difficult to spot at first. This isn't a minor manufacturing quirk: VW has confirmed through legal documents that "inferior thermoplastic materials were used" in these water pump components, and the issue has been the subject of multiple class-action lawsuits.
Watch for a low coolant warning, a sweet smell in the engine bay (especially after motorway driving), or fault codes P00B7, P2681, P1889, or P0128 — any of these are worth investigating immediately rather than topping up and continuing, since this failure can escalate from a slow leak to sudden, severe overheating within minutes. If this does need replacing, the entire water pump and thermostat housing assembly must be replaced together — never just one part of it.
Volkswagen Touran Radiator: The Part That Keeps Everything Else From Cooking
It's an unglamorous part, but on the Volkswagen Touran, the cooling system is behind almost every serious non-wear engine failure that could have been prevented. Spotting trouble here early is about as cheap an insurance policy as exists against a genuinely expensive repair bill.
Volkswagen Touran Radiator: Watch: Replacing It
Mk1 facelift Touran; nothing found for the MQB Mk2
Volkswagen Touran Radiator: What It Does
On the Volkswagen Touran, heat from the engine coolant is shed to the surrounding air through the radiator, keeping engine temperature in a safe range. On automatic gearboxes, it often doubles up, cooling transmission fluid through a separate internal circuit too — which is why getting the exact part number right matters more here than on a simple heat exchanger.
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Volkswagen Touran 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 Volkswagen Radiator
The same part, covered across other Volkswagen models.