Monroe MA839 Air Shock Absorber - Rear

Monroe Max-Air MA839 Rear Air Shock Absorber

Monroe Max-Air MA839 is a rear air shock absorber for towing and hauling applications where maintaining ride height matters. It can be inflated or deflated up to 150 PSI to help keep the vehicle level under added load, with capacity limited by the vehicle’s suspension, tires, and transmission.

The Monroe Max-Air Air Shock Absorber line is built for drivers who need adjustable rear support without changing the vehicle’s basic suspension layout. For Buick Rendezvous, Buick Terraza, Chevrolet Uplander, Pontiac Montana, Saturn Relay, Pontiac Aztek, and Oldsmobile Silhouette rear applications, MA839 provides an OE-style air-adjustable solution for load control.

Key Features

• Air-adjustable rear shock absorber with inflation and deflation up to 150 PSI
• Helps maintain level height when carrying cargo or towing
• Extended length: 15.61 in.; compressed length: 10.9 in.
• Travel length: 4.71 in. for rear suspension movement
• Metal dust shield included for added protection
• Loop bushing and sleeve mounts: upper LS33, lower LS42
• Replaces Monroe MA826 in listed applications

Detailed Description

MA839 is a Monroe Max-Air Air Shock Absorber engineered for rear suspension use on select GM minivans and crossover applications. It uses loop-style upper and lower mounts with bushing and sleeve construction, a 12 mm upper sleeve, and a 14 mm lower sleeve for the specified fitments. The shock body includes a metal dust shield, an extended bumper stop, and a reserve tube diameter of 1.641 in. This part cross-references Monroe Shocks & Struts 19169325 for the same application.

Fits 2002-2007 Buick Rendezvous, rear; Fits 2005-2006 Buick Terraza, rear; Fits 2005-2006 Chevrolet Uplander, rear; Fits 2002-2006 Pontiac Montana, rear; Fits 2005-2006 Saturn Relay, rear; Fits 2001-2005 Pontiac Aztek, rear; Fits 2002-2004 Oldsmobile Silhouette, rear. Some applications require the AK29 adapter kit when adapting air-adjustable shocks to vehicles without a rear air leveling system.

Common Uses

• Rear sag when towing a trailer
• Loss of ride height with cargo in the vehicle
• Uneven rear stance under added weight
• Need for adjustable rear suspension support
• Replacement of a worn rear air shock on listed vehicles

Installation Notes

Verify rear fitment by year, make, model, and suspension configuration before ordering. Some listed vehicles require the AK29 adapter kit when converting to air-adjustable shock absorbers on vehicles without a rear air leveling system. Confirm upper and lower mount style, sleeve size, and available clearance against the vehicle’s suspension layout. Follow the vehicle owner’s manual for load limits and installation guidance.

Quality Assurance

Monroe Max-Air MA839 is built as a suspension service part for the listed rear applications and follows Monroe’s established shock absorber design standards. Load capacity is limited by the vehicle suspension, tires, and transmission, so always verify the vehicle’s towing and hauling limits before use.