Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Wheel Alignment: Inspection: Caster
- Place the front tire on the turning radius gauge. Make sure the ground contact surfaces of the front and rear tires are at the same height.
- Set the adapter into the center of wheel, and then set the wheel alignment gauge.
- Measure the caster angle in accordance with the operation manual for wheel alignment gauge.
| Model | Tire size | Caster |
|---|---|---|
| WRX model | 235/45R17 | 6°30' |
| 245/40R18 | 6°33' | |
| STI model | 245/40R18 245/35R19 245/35ZR19 |
6°33' |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.