What happens if the upper arm is not replaced?

If the ball joint becomes detached from the upper arm, it will allow the wheel to move in the direct of camber and caster, as it will no longer be supported on its vertical axis.

Why is it called a frunk?

A clever portmanteau devised by Tesla drivers, the ‘frunk’ is a combination of the words ‘front’ and ‘trunk’, referring to the space at the front of the car. Because there’s no engine bay inside a Tesla, the space is freed up for shopping – although there is an advised weight limit of 50kg.

How do I access the rear bolt in the upper arm?

The upper arm is fixed into place with a bolt at the back of the wheel arch. You need to remove the wheel arch liner to access the bolt, and remove it from the arm, which can then be pulled clear.


Fill up your details to hear more from our experts and get the latest updates from Delphi.

I have read and accept the <a href="https://www.delphiautoparts.com/gbr/en/terms-conditions">Terms of Use</a> and <a href="https://www.delphiautoparts.com/gbr/en/privacy-policy">Privacy Policy</a>

A mechanic holding a diagnostic tool


Discover our extensive range of OE-level diagnostic and test equipment for quicker, more accurate servicing and repairs.

Two mechanics ready to start training


Choose from our expert-led, accredited training courses to enhance your skills and prepare you for the vehicles of tomorrow.