Are intercooler and charge air cooler the same thing?

Yes. "Intercooler" and "Charge Air Cooler" refer to the same car part. Other common names include Charge Air Cooler, Turbo Intercooler. The part is the same regardless of which name is used.

What are the symptoms of a failing intercooler?

Signs of a failing intercooler include a loss of power and turbo boost, increased fuel consumption, excessive exhaust smoke and oil residue around the intercooler or pipework. A cracked core or split hose lets pressurised charge air escape, so the engine struggles to make full power.

What does an intercooler do?

An intercooler, also called a charge air cooler, cools the hot, compressed air from the turbocharger before it enters the engine. Cooler air is denser and carries more oxygen, which improves combustion, power and efficiency, so a healthy intercooler is important on any turbocharged engine.

How much does an intercooler cost to replace?

The price of an intercooler depends on your exact vehicle and the brand you choose. Enter your registration above to see parts confirmed to fit, then compare prices from the brands we stock on this page. Free UK delivery on orders over £99.

How do I find the right intercooler for my vehicle?

Intercoolers are sized and shaped to fit a specific engine and model, so enter your registration above to filter to parts confirmed to fit. Check the connection sizes and mounting points against your old unit, as turbo and non-turbo variants of the same model often use different coolers.

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Intercooler buying guide — what to know before you buy

The intercooler (charge air cooler) cools the compressed air from the turbocharger or supercharger before it enters the engine, increasing air density and allowing a larger, more efficient combustion event. A damaged or oil-contaminated intercooler reduces boost pressure and power output and can cause turbocharger damage.

Why charge air cooling matters

Air temperature rises significantly during turbocharger compression. Hot air is less dense, meaning each intake stroke draws in less oxygen — reducing the potential power output even though the pressure has increased. The intercooler is a heat exchanger that cools the charged air before it enters the manifold, restoring density and allowing the engine management to add more fuel for a more complete combustion event.

Air-to-air intercoolers (the most common type) mount in the airflow path — usually at the front of the vehicle — and use ambient air flowing through the core to cool the charge air. Air-to-water intercoolers use engine coolant or a separate water circuit and are more compact but require additional plumbing.

Failure causes and symptoms

Intercooler cores crack or develop pinhole leaks from age, vibration, and stone damage. A leaking intercooler causes boost pressure loss, reduced power under load, and in some cases a noticeable hissing or whooshing noise from the engine bay. Oil contamination inside the intercooler — from turbocharger seals passing oil into the intake tract — is common and reduces heat transfer efficiency significantly. In severe cases oil pools in the intercooler and can cause a rich-running condition on start-up.

Any vehicle with a persistent oil weep from the intercooler outlet should have the turbocharger seals investigated.

Power loss under sustained boost
Boost pressure drop on diagnostic scan
Hissing from boost piping on acceleration
Oil contamination inside intercooler core
Visible external damage to the core fins

Replacement

Intercooler replacement requires careful re-routing of the silicone boost hoses and clamps at each end. Inspect all boost hoses at the same time — cracked or split hoses cause the same symptoms as a leaking core. Use the registration lookup to confirm the correct intercooler size and pipe positions for your vehicle and engine variant.