KYB 5640012 Suspension Strut - Front

KYB MonoMax Front Suspension Strut for F-150

The KYB MonoMax 5640012 is a front suspension strut for 2021-2025 Ford F-150 models without Electronic Suspension and without the Heavy Duty Payload Package. Built for trucks that carry weight, tow, or see rough roads, it uses a heavy-duty monotube design to maintain control and consistent damping under demanding conditions.

Key Features

• Fits 2021-2025 Ford F-150, front, w/o Electronic Suspension, w/o Heavy Duty Payload Package
• Large-bore KYB MonoMax design for added stability in heavier trucks
• Monotube construction for consistent response and fade-resistant performance
• Work-ready zinc-coated steel piston ring for durability
• Includes an off-road dust boot
• Compressed length: 15.75 in; extended length: 20.71 in; stroke length: 4.96 in
• Lower mount type: E3(88.75x117x13); upper mount type: S1(12MM)

Product Details

KYB MonoMax 5640012 is engineered for front-end control on the Ford F-150 when the truck is used for real work, towing, hauling, or off-pavement driving. The monotube layout helps the strut react consistently to changing road conditions, while the large bore construction supports the stability needed by higher center-of-gravity and heavier-duty vehicles. If you are replacing a worn front strut on a 2021-2025 Ford F-150, this KYB MonoMax front suspension strut provides a direct-fit solution for the listed configuration. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Excessive front-end bounce after bumps or dips
• Reduced steering control during towing or hauling
• Front suspension fade during repeated load changes
• Uneven ride response on rough or off-road surfaces
• Worn strut performance on high-mileage Ford F-150 trucks

Installation Notes and Tips

Verify that your truck is a 2021-2025 Ford F-150 front application without Electronic Suspension and without the Heavy Duty Payload Package before ordering. Compare the mount style and dimensions to the original strut, and inspect related suspension components such as mounts, springs, and bushings during replacement. Professional installation and a post-installation alignment are recommended after front strut service.

Quality Assurance

KYB is known for suspension components used in demanding truck applications, and the MonoMax line is built around durability, load control, and consistent damping performance. Part number 5640012 is designed to meet the needs of Ford F-150 owners who want a front strut suited to towing, hauling, and work-truck use.