The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance.
In most cases, you will not need to have your wheels aligned again. However, if you notice unusual tire wear or your vehicle pulling one way or the other, the alignment may need to be reset.
If you notice your vehicle vibrating when driving on a smooth road, your wheels may need to be rebalanced.
NOTICE
Improper wheel weights can damage your vehicle’s aluminum wheels. Use only approved wheel weights.
Hyundai Sonata LF 2014-2019 Service Manual: Speaker Repair procedures
Inspection
1.
Troubleshooting for Speaker
(1)
Basic inspection of speaker
Inspect the sound from speaker after verifying that the
speaker mounting screws is removed and the wiring connector is connected
precisely to remove vibration transmitted from body trims and
surrounding parts.
...
Hyundai Sonata LF 2014-2019 Service Manual: Lift And Support Points
General Information
When heavy rear components such as suspension, fuel tank,
spare tire, tailgate and trunk lid are to be removed, place additional
weight in the luggage area before hoisting. When substatial weight is
removed from the rear of the vehicle, the center o ...