KYB 341678 Suspension Strut - Rear

KYB Excel-G Rear Strut for BMW E39

The KYB Excel-G 341678 is a rear suspension strut for select BMW 5 Series E39 applications. It is built to restore original ride control, steering response, and body stability without changing the vehicle’s designed handling balance.

For BMW 525i, 530i, and 540i rear suspension service, this KYB Excel-G strut is a direct OE-style replacement choice. The 341678 is made on KYB OE assembly lines and uses OE-quality components calibrated to return factory performance.

Key Features

• KYB recommended OEM replacement strut
• Restores designed control and handling for BMW 5 Series rear suspension
• Nitrogen gas-charged, twin-tube construction
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Made in USA
• Compatible with electronic safety systems when the suspension is operating as designed

Product Details

KYB Excel-G is an Original Equipment for the Aftermarket (OEA) line focused on restoring factory ride characteristics rather than altering them. This rear strut uses a compressed length of 15.47 inches, an extended length of 23.22 inches, and a stroke length of 7.75 inches. Mount dimensions are E2 (15.2 x 66.3) at the lower mount and 10 x 1.00 at the upper mount. The design does not include a dust cover, internal rebound spring, B-stop, or R-stop.

Fits 2001-2003 BMW 530i, rear; Fits 1997-2003 BMW 540i, rear; Fits 2001-2002 BMW 525i, rear; Fits 2003 BMW 525i, rear. This part cross-references Monroe Shocks & Struts 71349 for the same application.

Common Problems This Part Can Address

• Excessive rear-end bounce after bumps
• Loose or delayed steering response during lane changes
• Reduced tire contact and uneven body control over rough roads
• Noise or vibration from worn rear suspension damping
• Loss of factory ride balance on BMW 5 Series E39 models

Installation Notes and Tips

Verify rear fitment by year, model, and suspension package before ordering. This strut is not listed for M-Technik suspension or electronic suspension applications where noted in the fitment data. For reduced noise and vibration, KYB recommends replacing the strut mount with part number SM5251. To help protect the new strut from dirt, debris, and road salt, KYB recommends strut boot SB107.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers, and the Excel-G line is produced on the same OE assembly lines using OE-quality components. The 341678 is calibrated to restore original performance for compatible BMW 5 Series rear applications.