Arnott MR-3438 Suspension Strut - Front

Front Magnetic Ride Strut for Cadillac STS

Arnott MR-3438 is a new front suspension strut for the 2007-2010 Cadillac STS with rear wheel drive and GM Magnetic Ride Control. It uses a monotube design with magnetorheological fluid to maintain the adaptive damping behavior expected from the original equipment system.

Built for the Cadillac STS front suspension, MR-3438 connects to the vehicle ECU without modification and supports the factory magnetically controlled ride response. This Arnott NEW line part is a direct-fit solution for drivers replacing a worn magnetic ride strut on the Cadillac STS.

Key Features

• Fits 2007-2010 Cadillac STS, front
• For RWD vehicles with GM magnetorheological damper system (Z95 RPO / F55)
• Monotube internal construction
• Adjustable damping with electromagnetic coil control
• New unit with spring seat included
• Upper mount type: stud; lower mount type: base cup
• Mounting hardware included
• No boot, air bladder, or air ride suspension

Product Details

Arnott MR-3438 is engineered as an OES-style front magnetic ride strut for the Cadillac STS. The damper uses magnetorheological fluid, a synthetic oil containing iron particles that respond to electromagnetic fields. When the coils are energized, the fluid’s viscosity changes quickly to alter suspension stiffness and preserve the adaptive ride characteristics of the factory system. MR-3438 is a new part in Arnott’s NEW product line and connects to the ECU without modifications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. If you are searching for an Arnott MR-3438 front strut for Cadillac STS Magnetic Ride, this unit matches the confirmed front fitment for 2007-2010 models with the correct suspension package.

Common Replacement Reasons

• Front strut noise over bumps or rough pavement
• Loss of adaptive damping response
• Excessive bounce, harshness, or inconsistent ride quality
• Warning lights or suspension faults related to the magnetic ride system
• Oil leakage or wear in the original front strut

Installation Notes

Verify the vehicle is a 2007-2010 Cadillac STS, front, with rear wheel drive and the GM Magnetic Ride Control system before installation. MR-3438 uses a stud upper mount and base cup lower mount, and the spring seat is included. Because this is an electronically controlled suspension component, confirm all electrical connections and system codes after installation.

Quality Assurance

Arnott supplies this front magnetic ride strut as a new replacement part for the Cadillac STS platform. The design follows the factory adaptive damping concept and connects to the ECU without modification, supporting OE-style operation for the confirmed application.