Mercedes-Benz GLA Radiator: Specs, Fitment & Common Faults
On the GLA, a water pump and thermostat housing failing together on related models has genuinely been quoted at around £550 — Mercedes-Benz UK offered a 50% goodwill discount specifically on the water pump.
Illustration for editorial purposes
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OEM Part Number: A2465001403 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 627063 / Valeo 701158
| Radiators (aftermarket) | Nissens 627063 (640 x 422 x 32 mm, aluminium core with plastic tanks, fits GLA 220 4MATIC and GLA 250 with the M270 2.0 turbo); Denso DRM17054; Mahle CR 2171 000S; NRF 59239; Van Wezel 30002654; Ava MS2654; Hella 8MK 366 304-991; Prasco ME328R003. For the GLA 180/200 petrol and 180d/200d/220d diesel: Van Wezel 30002653 (640 x 438 x 26 mm, aluminium with plastic tanks, same-platform W176/W246/C117 fit) |
|---|---|
| Core sizes & variants | All X156 radiators share a 640 mm core length. The 2.0 M270 GLA 220 and 250 take a 32 mm deep core; the 1.6 petrol and OM607/OM651 diesels use a 26 mm core at 438 mm high; and the M133 GLA 45 AMG has its own 26 mm radiator with different tanks. |
| Genuine (OE) numbers quoted | A2465001403 (GLA 220/250); A0995006603 (GLA 45 AMG); the 1.6/diesel radiator is listed under A2465000303 and A2465001203 on sister models |
| Fitment notes | Hose connections are 33 mm throughout. The Nissens 627063 is supplied with seals and the 627044 with a filler cap |
Mercedes-Benz GLA Radiator: The Part That Keeps Everything Else From Cooking
Few parts get less attention than this one, but on the Mercedes-Benz GLA, a neglected cooling system is behind the vast majority of avoidable serious engine failures. Noticing the early warning signs costs nothing and can save a genuinely large repair bill down the line.
Mercedes-Benz GLA Radiator: What It Does
On the Mercedes-Benz GLA, coolant runs through the radiator to shed engine heat into the airflow, keeping temperatures in check. On many automatics, a separate internal circuit inside the same unit also cools the transmission fluid — one more reason a mismatched part number causes more than just a cooling problem.
Mercedes-Benz GLA Radiator: Watch: Replacing It
closest video found; the radiator comes out the same way once the front panel and fan are off
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A Genuinely Alarming, Honest Real Account Worth Knowing — Mercedes-Benz GLA Radiator
If a water pump and thermostat housing have both been found leaking at the same time, this is genuinely worth knowing: a water pump and thermostat housing failing together has been documented on genuinely young, low-mileage related models, with a combined repair cost of around £550 in one documented case. Mercedes-Benz UK offered a genuine 50% goodwill discount specifically on the water pump element, on the basis it had failed earlier than would reasonably be expected, worth directly asking for this kind of discount if facing a similar early failure.
It's also genuinely worth knowing that a slow water pump seal leak can drip coolant directly onto the spinning pulley behind it, which flings the coolant off, making a genuine leak surprisingly difficult to trace for some time.
Mercedes-Benz GLA 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 Mercedes-Benz Radiator
The same part, covered across other Mercedes-Benz models.