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.
2012 Kia Optima L4-2.4LFACTORY OEM SERVICE PROCEDURE
Rear Subframe: Service and Repair
Replacement
1. Remove the rear wheel & tire.
Tightening torque:
88.3 - 107.9N.m(9.0 - 11.0kgf.m, 65.1 - 79.6lb-ft)
CAUTION:
Be careful not to damage the hub bolts when removing the rear wheel & tire.
2. Remove the rear lower arm.
3. Remove the rear shock absorber.
4. Remove the rear upper arm.
5. Remove the trailing arm.
6. Remove the rear assist arm.
7. Remove the rear muffler.
8. Loosen the mounting bolts and then remove the rear cross member (A) from the frame.
Tightening torque:
156.9 - 176.5N.m(16.0 - 18.0kgf.m, 115.7 - 130.2lb-ft)
9. Installation is the reverse of removal.
Factory Service Tools
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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.
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