Volkswagen Polo Radiator: Specs, Fitment & Common Faults
If your Polo has a TSI turbo engine, VW has legally admitted to using "inferior thermoplastic materials" in the water pump housing — a real class-action settlement covers this.
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Volkswagen Polo Radiator: OEM Part Number
| Manual gearbox, all engines | Standard radiator with no transmission cooling circuit — genuinely simpler than the DSG/S-tronic equivalent |
|---|---|
| DSG/S-tronic (automatic), all engines | Main radiator remains largely the same core, but the car additionally has a separate oil-to-water heat exchanger for the gearbox mounted into the cooling circuit — confirmed as a genuinely different part from the radiator, so "the radiator" alone doesn't cover the whole DSG/S-tronic cooling system |
| Higher-power/performance engines | Larger-capacity radiator core to handle the increased heat load from these more powerful, more highly boosted engines — not a straightforward swap from the standard engine's radiator despite similar mounting points |
Confirmed: A Genuinely Serious, Class-Action-Level Design Flaw on TSI Engines — Volkswagen Polo 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 Polo Radiator: The Part That Keeps Everything Else From Cooking
Unglamorous as it is, the Volkswagen Polo'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.
Volkswagen Polo Radiator: What It Does
On the Volkswagen Polo, 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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Volkswagen Polo 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.