Intercooler SUBARU LEGACY 2009

OEM: 21821AA051

Disassembled car photo

Engine running

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Details for this exact part

Code
21821AA051
OEM
21821AA051
Condition
Used
Availability
1 in stock - ready to ship
Make, model
SUBARU LEGACY 2009-2014
Year
2009
Engine
Diesel 2.0L 110KW - 20Z
VIN
JF1BRDLZ4AG007219

What is this part and why does it matter?

The intercooler cools compressed air from the turbocharger before it reaches the engine — cooler air is denser, which improves combustion efficiency and power.

An intercooler cools the charge air and is distinct from both the turbocharger and the engine radiator. Compare dimensions, hose positions, brackets and part reference. Read the condition information for fins and connections. Hoses, sensors and additional brackets are only included when the listing expressly says so.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Noticeable loss of power, especially under sustained hard acceleration
  • Whistling or hissing noise (boost leak) from a cracked intercooler
  • Oil residue at the intercooler (from a failing turbo, not the intercooler itself)

Installation information

Mounted with brackets, usually behind the front bumper — connect all pipes with clamps and check for leaks after installation.

Frequently asked questions

A struggling or undersized intercooler can’t keep up with heat soak during sustained high-boost driving (e.g. on a track or long uphill pull), letting intake air temperatures rise and reducing power — this is sometimes called heat soak.

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