KYB 3448017 Suspension Shock Absorber - Rear

KYB Excel-G Rear Shock for BMW

The KYB Excel-G rear shock absorber is built to restore original ride control, stability, and handling on select BMW applications. This nitrogen gas-charged, twin-tube design uses OE-quality components and is calibrated to return the vehicle to its intended damping response.

Part number 3448017 is a KYB Excel-G shock absorber for rear suspension service on BMW 2 Series, 3 Series, 4 Series, and 5 Series applications listed below.

Key Features

• KYB recommended OEM replacement strut/shock for rear suspension service
• Restores designed control and handling on BMW applications
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Supports proper operation of electronic safety systems by maintaining suspension performance as engineered
• Strong strut body and bracket construction helps minimize flex and maintain alignment
• Compressed length: 14.96 in; extended length: 21.25 in; stroke length: 6.29 in
• Lower mount type: E2 (13.2 x 63.9); upper mount type: S1 (10 mm)

Excel-G Product Line Details

KYB Excel-G is an Original Equipment for the Aftermarket line made on the same KYB OE assembly lines used for new vehicle supply. It is engineered to match original damping characteristics rather than alter ride feel, making it a practical choice for drivers who want factory-style response from a replacement rear shock.

Detailed Description

KYB 3448017 is a rear suspension shock absorber designed for BMW models that require OE-style ride control. It is a twin-tube, nitrogen gas-charged unit with a triple-lip fluid seal and application-specific valving to help maintain consistent damping. This part cross-references Monroe Shocks & Struts 5681 for the same application. Compatible BMW applications include rear shock service on 2012-2016 BMW 328i, 2013-2014 BMW 320i xDrive, and 2017-2021 BMW 230i xDrive, along with additional rear-fit BMW 3 Series, 4 Series, and 5 Series listings shown below.

Vehicle Fitment

• Fits 2017-2021 BMW 230i xDrive, Rear; Recommended OEM Replacement; Except Adaptive Control Suspension; Excel-G
• Fits 2017-2020 BMW 230i, Rear; Recommended OEM Replacement; Except Adaptive Control Suspension; w/o Sport Suspension; Excel-G
• Fits 2017-2019 BMW 330i xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2013-2018 BMW 320i, Rear; Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
• Fits 2016-2018 BMW 320i xDrive, Rear; Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
• Fits 2013-2014 BMW 320i xDrive, Rear; Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
• Fits 2014-2018 BMW 328d, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2014-2018 BMW 328d xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2016-2018 BMW 330e, Rear; Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
• Fits 2017-2018 BMW 330i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension; Excel-G
• Fits 2016-2018 BMW 340i, Rear; Recommended OEM Replacement; Except Adaptive Control Suspension and w/o Sport Suspension; Excel-G
• Fits 2016-2018 BMW 340i xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2017 BMW 430i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension and w/o Sport Suspension); Excel-G
• Fits 2017 BMW 440i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension and w/o Sport Suspension); Excel-G
• Fits 2016 BMW 228i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension); w/o Sport Suspension; Excel-G
• Fits 2012-2016 BMW 328i, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2016 BMW 328i xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2013-2014 BMW 328i xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2014-2016 BMW 428i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension and w/o Sport Suspension); Excel-G
• Fits 2014-2016 BMW 435i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension and w/o Sport Suspension); Excel-G
• Fits 2014-2015 BMW 228i, Rear; Recommended OEM Replacement; (Except Adaptive Control Suspension); (Exc. Sport Package); Excel-G
• Fits 2015 BMW 328i xDrive, Rear; (Except Adaptive Control Suspension); Excel-G
• Fits 2012-2015 BMW 335i, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G
• Fits 2013-2014 BMW 335i xDrive, Rear; Recommended OEM Replacement (Except for vehicles with Adaptive Control Suspension); Excel-G

Common Issues This Part Addresses

• Excessive rear bounce or oscillation after bumps
• Loose or unstable rear-end handling during lane changes
• Reduced tire contact and uneven damping response
• Oil or gas leakage from a worn rear shock absorber
• Loss of factory-style ride control on BMW rear suspension systems

Installation Notes and Tips

Follow the manufacturer’s instructions for the vehicle, especially on applications that require suspension strut and coil spring assembly service. Verify rear fitment against the exact BMW model, drivetrain, and suspension package before installation, since some listings exclude Adaptive Control Suspension, Sport Suspension, or Sport Package configurations.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers, and Excel-G is produced on KYB OE assembly lines using OE-quality components. The design focus is restoring original performance characteristics for BMW rear suspension service rather than changing ride behavior.