Repair cost
$0–$1,800
DIY difficulty
3 / 5
Severity
Minor
Annoying or cosmetic — schedule when convenient
Affected
2015-2021
Top-mount intercooler, Intake
What goes wrong
Stock top-mount intercooler heat soaks in traffic, cutting power.
Symptoms to watch for
- Sluggish in traffic
- Lower boost
- Knock learned
Root cause
TMIC sits over hot turbo with limited airflow at low speeds.
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Buy time with these
- • Hood vent scoop water spray
- • Avoid extended idle after spirited driving
Permanent fix
- FMIC conversion (Mishimoto, Process West) or upgraded TMIC + scoop.
FAQ
What causes wrx tmic heat soak power loss?
TMIC sits over hot turbo with limited airflow at low speeds.
How much does it cost to fix?
National average $0–$1,800.
Is this a DIY repair?
Difficulty 3/5. FMIC conversion (Mishimoto, Process West) or upgraded TMIC + scoop.
What are the symptoms?
Sluggish in traffic; Lower boost; Knock learned
Sources
- • NHTSA
- • Subaru Owner Forums