Maintenance And Service - Subaru WRX 2021 Owner's Manual

Maintenance schedule.......................................... 11-3
Maintenance precautions ..................................... 11-3
Before checking or servicing in the engine
compartment ...................................................... 11-4
When checking or servicing in the engine
compartment ...................................................... 11-5
When checking or servicing in the engine
compartment while the engine is running ............ 11-5
Maintenance tips................................................... 11-6
Removing and reinstalling clips ............................ 11-6
Engine hood .......................................................... 11-9
Engine compartment overview .......................... 11-11
STI...................................................................... 11-11
Except STI .......................................................... 11-12
Engine oil............................................................. 11-13
Engine oil consumption ...................................... 11-13
Checking the oil level.......................................... 11-13
Changing the oil and oil filter .............................. 11-15
Recommended grade and viscosity ..................... 11-15
Synthetic oil........................................................ 11-15
Cooling system ................................................... 11-16
Cooling fan, hose and connections ..................... 11-16
Engine coolant.................................................... 11-17
Air cleaner element............................................. 11-18
Replacing the air cleaner element........................ 11-19
Spark plugs ......................................................... 11-20
Recommended spark plugs ................................. 11-20
Drive belts ........................................................... 11-20
Manual transmission oil ..................................... 11-21
Recommended grade and viscosity ..................... 11-21

Maintenance and service

Continuously variable transmission fluid..........11-22
Front differential gear oil (CVT models) and
rear differential gear oil....................................11-22
Recommended grade and viscosity..................... 11-22
Power steering fluid (STI) ...................................11-22
Checking the fluid level ...................................... 11-22
Recommended fluid............................................ 11-23
Brake fluid............................................................11-23
Checking the fluid level ...................................... 11-23
Recommended brake fluid .................................. 11-24
Clutch fluid (MT models).....................................11-24
Checking the fluid level ...................................... 11-24
Recommended clutch fluid ................................. 11-25
Brake booster ......................................................11-25
Brake pedal ..........................................................11-26
Checking the brake pedal free play ..................... 11-26
Checking the brake pedal reserve distance ......... 11-26
Clutch pedal (MT models)...................................11-27
Checking the clutch function .............................. 11-27
Checking the clutch pedal free play .................... 11-27
Hill start assist system .......................................11-27
Replacement of brake pad and lining ................11-28
Breaking-in of new brake pads (models with
electronic parking brake system) ..................... 11-28
Breaking-in of new brake pads and linings
(models without electronic parking brake
system) ........................................................... 11-28
Parking brake stroke (models without
electronic parking brake system)....................11-29
11