Hyundai Sonata: Rear Suspension System / Rear Assist Arm Repair procedures

Replacement
1.
Raise the vehicle, and make sure it is securely supported.
2.
Remove the wheel cap (A).

   
Be careful not to damage to the wheel cap (A) when removing the it.
3.
Remove the front wheel and tire (A) from front hub.

Tightening torque :
88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft)

   
Be careful not to damage to the hub bolts when removing the front wheel and tire (A).
4.
Remove the assist arm protector.

5.
Loosen the bolt & nut and then remove the rear assist arm (A) with the sub frame.

Tightening torque :
107.9 ~ 117.7 N.m (11.0 ~ 12.0 Kgf.m, 79.6 ~ 86.8 lb-ft)

   
Set up the transmission jack under the lower arm in order to remove the shock absorber in no-load condition .
Record the position of the alignment marks before removing the rear lower arm to keep from tightening the bolt and washer to the wrong position or the wrong direction.
6.
Loosen the bolt and then remove the assist arm.

Tightening torque :
137.3 ~ 156.9 N.m (14.0 ~ 16.0 kgf.m, 101.3 ~ 115.7 lb-ft)

   
Set up the transmission jack under the lower arm in order to remove the shock absorber in no-load condition .
Record the position of the alignment marks before removing the rear lower arm to keep from tightening the bolt and washer to the wrong position or the wrong direction.
Installation
1.
Installation is the reverse of removal.
   
Install the component with the specified torques.
When installing the bolt, install the lower arm in no-load condition by using the transmission jack.
2.
Check the alignment.
(Refer to Tires/Wheels - "Alignment")
Inspection
1.
Check the bushing for wear and deterioration.
2.
Check the rear lower arm for deformation..
3.
Check the coil spring and spring pad for deterioration and deformation.
4.
Check for all bolts and nut.
Rear Lower Arm Repair procedures
Removal 1. Raise the vehicle, and make sure it is securely supported. 2. Remove the wheel cap (A).     Be careful not to damage to the wheel cap (A) when removing the it. ...

Trailing Arm Repair procedures
Replacement 1. Raise the vehicle, and make sure it is securely supported. 2. Remove the wheel cap (A).     Be careful not to damage to the wheel cap (A) when removing the it ...

Other information:

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Hyundai Sonata LF 2014-2019 Service Manual: Photo Sensor Repair procedures
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