SUBARU Impreza WRX STi Coolant replacement Cost
2003–2005 · Engine, Fuel & Emissions system
Typical range
$316–$1.6k
Parts + labour
Labour hours
1–3h
At a typical garage
Coolant service — including replacement, system bleeding, pressure testing or sensor repair — maintains optimal engine temperature and prevents corrosion inside the cooling circuit. Modern long-life coolant should still be replaced every 3–5 years as inhibitors deplete. SUBARU Impreza WRX STi coolant service costs $316–$1596.
Warning signs you need this repair
- Temperature gauge reading higher than normal
- Coolant warning light or low coolant level alert
- Discoloured or rusty coolant visible in the reservoir
- Overheating under load or in traffic
- Heater output reduced (air lock in the system)
Typical parts included
- Charge-air cooler coolant radiator
- Electric coolant pump
- Coolant hose set
- Coolant control valve
- Coolant expansion tank
- Coolant pipe
What affects the price
- Type of coolant specified (OAT, HOAT, G11/G12/G13 — mixing types causes damage)
- Whether a pressure test reveals an underlying leak needing repair
- Electric coolant pump failure (common on BMW N-series and similar)
- System complexity on turbocharged or hybrid vehicles with multiple coolant circuits
Common questions
How much does coolant replacement cost on a SUBARU Impreza WRX STi?
Coolant replacement on a SUBARU Impreza WRX STi (2003–2005) typically costs between $316 and $1.6k including parts and labour at an independent garage.
What parts are needed for coolant replacement on a SUBARU Impreza WRX STi?
Common parts for this repair include: Charge-air cooler coolant radiator, Electric coolant pump, Coolant hose set, Coolant control valve, Coolant expansion tank, Coolant pipe.
How long does coolant replacement take on a SUBARU Impreza WRX STi?
Coolant replacement on a SUBARU Impreza WRX STi typically takes 1–3 hours of labour at a garage.
How often does coolant replacement need to be done?
For a SUBARU Impreza WRX STi, coolant replacement is typically needed coolant replaced every 3–5 years or 60,000 miles; pressure test when overheating or leaks suspected.
Other engine, fuel & emissions system repairs on the SUBARU Impreza WRX STi
- ABS hydraulic unit replacement$340–$587
- ABS sensor replacement$140–$242
- ABS system bleeding$112–$193
- AC compressor clutch replacement$280–$483
- AC compressor replacement$300–$518
Coolant replacement cost on similar cars
- OPEL Astra 5 Doors$160–$276
- VOLKSWAGEN Golf 5 Doors$160–$276
- MERCEDES BENZ A-Klasse$160–$276
- RENAULT Megane 5 Doors$160–$276
- FORD Focus 5 Doors$160–$276
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