Vauxhall Corsa Radiator: Specs, Fitment & Common Faults

Many Corsas have no temperature gauge — just a warning light that comes on once it's already running hot. Here's why that makes cooling system vigilance genuinely more important.

Illustration for editorial purposes

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OEM Part Number: 1300361 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 630786 / Denso DRM20120

Accuracy note: Covers the Vauxhall Corsa (E 2014-2019) 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 630786 (620 x 373 x 16 mm, aluminium soldered core, plastic tanks, 1.4 75/90 PS, 1.4 Turbo 100/150 PS and 1.6 VXR); Denso DRM20120; Mahle CR 2244 000S; NRF 59272; Van Wezel 37012716; Hella 8MK 366 301-491; Magneti Marelli 350213206800. Nissens 606390 (620 x 366 x 22 mm, aluminium soldered core, plastic tanks, 1.4 90 PS and 1.4 Turbo 100/150 PS); Mahle CR 2789 000P
Core sizes & variants	Two radiators are listed for the 1.4 petrol Corsa E. The 16 mm Nissens 630786 is the common unit and also covers the 1.6 VXR; the 22 mm Nissens 606390 is supplied with a thermostat and carries a different GM number, so match the OE number on the old part. The 1.0 Turbo, 1.2 and 1.3 CDTi were not confirmed here.
Genuine (OE) numbers quoted	1300361, 1300379, 13440199, 13486483 (630786); 39059781 (606390)
Fitment notes	Inlet and outlet are 34 mm (630786) or 34.5 mm (606390); both are supplied with seals.

Accuracy note: genuinely worth knowing: higher-power Corsa engine variants often use a larger, higher-capacity radiator than the entry-level engine in the same range — matching by engine code rather than just model name avoids under-specifying the cooling capacity.

A Genuinely Important Design Choice: Many Corsas Have No Temperature Gauge — Vauxhall Corsa Radiator

Worth knowing if you're not already aware: Vauxhall removed the conventional temperature gauge from the dashboard on many Corsa models, replacing it with a warning light that only illuminates once the engine is already running hot. This means there's genuinely no early warning of a developing cooling problem the way there is on a car with a proper gauge — by the time you see the light, the engine may already be at a temperature capable of causing damage, particularly warping the cylinder head, which these engines are documented as being prone to if run hot even briefly. This makes staying on top of coolant level checks and addressing any cooling system symptom promptly considerably more important on a Corsa than on a car where you'd see the temperature climbing gradually first.

A genuinely common, overlooked cause of "mystery" coolant loss: a failing seal in the expansion tank cap itself is a well-documented cause of coolant loss and a hissing sound when hot, and it's often overlooked in favour of investigating the thermostat or head gasket first. If coolant keeps disappearing with no visible leak and the cap area is damp or you can hear hissing when the engine's hot, replacing the cap itself (a genuinely cheap part) is worth trying before more expensive diagnostics.

Vauxhall Corsa Radiator: The Part That Keeps Everything Else From Cooking

This isn't a part anyone gets excited about, but on the Vauxhall Corsa, 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.

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.

Vauxhall Corsa Radiator: Watch: Replacing It

🎬 Watch: Opel Corsa E Radiator replacement

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Opel-badged Corsa E, identical to the Vauxhall.

Vauxhall Corsa Radiator: What It Does

Keeping the Vauxhall Corsa'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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Vauxhall Corsa 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 Vauxhall Radiator

The same part, covered across other Vauxhall models.