Keep the rear suspension precisely located with the Mevotech Supreme Lateral Arm CMS401211, a direct-fit replacement that installs in the rear left upper position on the 2015-2025 Ford Mustang. This lateral arm helps locate the rear knuckle and control suspension geometry so the wheel tracks properly and alignment stays where it belongs.
Worn bushings or a bent arm can let the rear wheel shift under load, producing clunks over bumps, uneven tire wear, or alignment that won't hold. If a worn lateral arm is the cause, this unit helps restore proper location of the rear suspension. Sold individually; order per your vehicle's requirement and have an alignment performed after installation.
Interchange: 527-503
527503 · 19363052 · LGS401211 · CA8980 · FR3Z5500D · FR3Z5500H · RK643304 · C5GS401211 · GS401211 · 2608359 · 1112104 · 30034452 · 3CB40568 · X15CJ7085 · CP5142
This part cross-references / interchanges with the following part numbers:
What is this part and where does it install?
It's a rear left upper lateral arm (control arm) for the rear suspension, replacing MPN CMS401211 on the listed Ford Mustang applications.
Which Ford Mustang years does it fit?
It fits the 2015-2025 Ford Mustang. Check the Buyer's Guide tab to confirm your exact trim and engine before ordering.
What is the lateral arm made of?
Forged steel construction, finished with a protective surface treatment that helps resist corrosion and rust build-up.
What does the knurling do?
The added knurling locks the control arm bushing to the sub-frame, helping ensure a secure, optimal fit during installation.
What are signs this lateral arm may need replacing?
Clunking or rattling from the rear over bumps, uneven rear tire wear, or difficulty holding an alignment can be signs of a worn arm—diagnose the cause first.
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.
