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Air and Fuel› Air and Fuel Cooling Systems and Components

Subaru

Turbocharged Intercooler

$519.02 $351.89 Save $167.13

SKU: 21821AA031

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In Stock
Ships by Oct 13
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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

If your turbocharged Subaru is experiencing reduced acceleration or a hissing sound during acceleration, this intercooler may need to be repaired or replaced.
Show original supplier description
The Subaru Charge Air Cooler, part number 21821AA031, is a complete intercooler assembly designed as a direct replacement for various Subaru models. This component is crucial for turbocharged engines, as it helps cool the compressed air before it enters the engine, optimizing performance. If your Subaru is equipped with a turbocharger and you've noticed a reduction in acceleration, or if you hear a hissing sound during acceleration accompanied by a check engine light, your intercooler or its associated piping/tubes may require repair or replacement. This genuine Subaru part ensures proper fit and function for your vehicle. This intercooler is compatible with a wide range of Subaru vehicles, including the Forester, Impreza, Legacy, Outback, and WRX models, spanning various model years from 1995 to 2026. Specific fitment details can be confirmed using the vehicle confirmation tool.
Vehicle Symptoms
  • Loss of acceleration under boost
  • Hissing sound during hard acceleration
  • Check engine light with boost-related codes
  • Reduced fuel economy and sluggish response
  • Turbo lag or inconsistent boost pressure
Diagnostic Codes
  • P0236 – Turbocharger/Supercharger Boost Snsr A Range/Perf
  • P1252 – Turbo Boost Press Low
  • P1253 – Turbo Boost Press Not Det
Relevant Conversations
  • Subaru WRX intercooler replacement symptoms
  • hissing sound under acceleration Subaru
  • P1252 Subaru Forester XT
  • boost leak intercooler Subaru
  • Subaru intercooler 21821AA031 OEM
  • loss of boost Subaru aftermarket intercooler
  • Subaru charge air cooler failure
  • P0236 Subaru fix intercooler
  • Subaru STI intercooler upgrade vs OEM
  • intercooler install time Subaru

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSubaru
Part Number21821AA031
CategoryAir and Fuel
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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