Hyundai ix35 Radiator: Specs, Fitment & Common Faults

On the ix35, a leak specifically from the weep hole near the A/C compressor genuinely points toward a failing water pump seal.

Illustration for editorial purposes

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Hyundai ix35 Radiator: OEM Part Number

Manual gearbox, all engines	Standard radiator with no transmission cooling circuit
Automatic, most generations	Transmission oil cooler built into the radiator itself as an internal chamber, shared across the wider Hyundai/Kia platform family — genuinely a different radiator from the manual version

Accuracy note: genuinely worth knowing: automatic gearbox ix35s typically need a radiator with a built-in transmission oil cooler that manual versions don't have — ordering the manual-spec part for an automatic car will fit, but won't cool the gearbox oil properly.

A Genuinely Useful Diagnostic Detail Worth Knowing — Hyundai ix35 Radiator

If you're trying to pin down exactly where a coolant leak is coming from, this is genuinely worth knowing: a leak specifically from the small weep hole in the engine block near the A/C compressor points toward a failing water pump seal rather than a more general leak elsewhere.

A genuinely honest point worth knowing even after a recent water pump replacement: if a leak returns despite a relatively recent replacement, internal seals or bearings within even a new pump can occasionally be compromised, or the pump can be damaged by an unrelated issue. It's worth checking the timing belt tensioner and pulleys for wear at the same time, since improper belt tension can itself damage an otherwise sound water pump.

It's also worth knowing that the thermostat housing sits toward the front of the engine, higher up than where normal AC condensation would appear — worth checking this specific area if you're unsure whether water underneath the car is genuine coolant or harmless condensation.

Hyundai ix35 Radiator: The Part That Keeps Everything Else From Cooking

It's an unglamorous part, but on the Hyundai ix35, 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.

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.

Hyundai ix35 Radiator: What It Does

On the Hyundai ix35, 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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Hyundai ix35 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 Hyundai Radiator

The same part, covered across other Hyundai models.