Your Toyota FJ Cruiser has many parts, but control arms or "A arms" are some of the most important. Many suspensions have two, but some have four. However many your SUV has, its upper control arms specifically are vital. Like any arm, they connect a frame or body to a wheel assembly or steering knuckle. Their outer ends attach via a ball joint. Sometimes, it's permanently fastened, but usually, it's bolted on or pressed in, so you can change it if you ever need to. Rubber bushings, though, enable an arm to swing vertically. That makes going over bumps and across potholes easier. What do control arms themselves do? In short, they keep wheels on the road. Unfortunately, no control arm lasts forever. Not even the best, like those your OEM makes for your Toyota FJ Cruiser. If they don't end up damaged, sooner or later, they simply wear out. When they do, if they don't bend, they can break, and that will make any Toyota SUV unsafe to drive. Thankfully, it's easy to tell when they go bad. Aside from drifting brakes over rough terrain, you might hear pops and clunks or even lose a little control during driving. These symptoms indicate one of two issues: ball joint break-down or bushing tears. Both can lead to your wheels detaching from your suspension. To make sure that doesn't happen, lift your SUV on a hoist and inspect it. Do this once yearly. If you need to replace an upper control arm, be sure you buy genuine Toyota. Its compatibility with your FJ Cruiser is guaranteed. Aftermarket parts can't say the same. We carry only what's authentic, and you can buy what you need online, right here at our auto parts store. Order now!