Dorman - OE Solutions Suspension Control Arm and Ball Joint Assembly P/N:520-520
Help keep the front suspension composed and stable with the Dorman control arm 520-940. This front right lower forward control arm with ball joint is a direct replacement for the original equipment on the 1997-2003 BMW 540i, 1999-2000 BMW 540iT and 2000-2003 BMW M5. Engine details for each application are listed in the Buyer's Guide tab.
The arm links the wheel assembly to the chassis and lets the suspension travel up and down. Its integrated ball joint gives the steering knuckle a pivot point. Dorman puts the design through an industry-leading evaluation process aimed at a smooth ride, directional stability and predictable dynamics.
Signs this part may need replacing include clunking or knocking over bumps, loose or wandering steering, uneven tire wear and a worn ball joint or bushings. If the original arm is the cause, this assembly replaces it together with its ball joint and bushings. Control arms work as left and right pairs, so consider replacing both sides together for balanced handling. Follow the vehicle service information for the correct fasteners and for wheel alignment after installation.
Interchange: 102-4944
1024944 · 31121141962 · TC1227 · CA4238 · 3CB10106 · RK620120 · FA4499 · GS10169 · CMS10169 · 2605603 · SK620120 · JTC1004
This part cross-references / interchanges with the following part numbers:
Which BMW models does this Dorman lower control arm fit?
It is a direct replacement for the front right lower forward arm on vehicles including the 1997-2003 BMW 540i and 2000-2003 BMW M5. See the Buyer's Guide tab for the full list.
What comes with the Dorman suspension control arm and ball joint assembly?
Each assembly arrives with the ball joint and bushings pre-installed. The arm, joint and bushings go in as one unit, which saves time and labor.
What does a lower control arm with ball joint do?
It connects the wheel assembly to the chassis and lets the suspension move up and down. Its ball joint gives the steering knuckle a pivot point.
What are signs this control arm may need replacing?
Clunking over bumps, loose or wandering steering, uneven tire wear or play in the ball joint can be signs of a worn arm. Other parts can cause them too, so inspect the suspension before replacing anything.
Does the arm have any corrosion protection?
Yes. Dorman adds additional coatings to help the assembly resist rust and corrosion.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.