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Replacement front upper control arm for NB

NB replacement upper control arm
Replacement front upper control arm for NB
Because you can't replace just the ball joint, unfortunately.

Replacement front upper control arm for NB, left: 12 in stock
Replacement front upper control arm for NB, right: 5 in stock



The NB front upper control arm contains a ball joint that was not designed to be replaceable. Unfortunately, there is no aftermarket replacement ball joint that is designed specifically for the different taper used in the NB upright. This means that if you have a bad ball joint, you have to change out the whole arm.

You can tell if your upper ball joint is bad if you get a hard thump under braking or sudden cornering loads. Also, the ball joint should have some resistance to movement and not just flop around. Failure usually starts with a damaged boot that allows debris into the joint.

Cars that use NB uprights should use an NB upper control arm. Cars with NA uprights will need an arm with an NA ball joint.

This is a Moog aftermarket replacement part. It includes new rubber bushings as well as the ball joint. Ready to bolt in.

There is a bracket for an ABS sensor on the arm. That's the only difference between right and left - if your car doesn't have ABS, it doesn't matter. Right and left refer to the car as viewed from the driver's seat - in North America, the left is the driver's side.

While this part is not adjustable for alignment, we do recommend getting your alignment checked after installation just in case. 

Additional Information

Additional Information

Part number M13-8211x
Fits: 1999, 2000, 2001, 2002, 2003, 2004 (non-MSM), 2005 (non-MSM), MSM
Manufacturer Moog
Flyin' Miata exclusive No
Fits Exocet? Yes
Proposition 65 Warning: Cancer and reproductive harm
California emissions Emissions regulations do not apply
Instructions for this part are not currently available online.

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