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KYB 339378 Suspension Strut - Front Left
| Brand | KYB 339378 |
|---|---|
| Position | Front Left |
| Compressed Length | 13.93 |
| Extended Length | 19.44 |
| R-stop | Y |
| Stroke Length | 5.51 |
| Upper Mount Type | 14X1.50 |
| Product line | Excel-G |
| Fits | Buick · 7 vehicles |
OE replacement strut. Restores original ride control, stability, and handling.
Twin-tube design. Nitrogen gas-charged for consistent damping performance.
Triple-lip fluid seal. Helps reduce the chance of oil and gas leaks.
Cross-references General Motors 20901087 and Monroe Shocks & Struts 72529 for the same application. See all 2.
KYB Excel-G Front Left Strut for Buick LaCrosse
KYB Excel-G part number 339378 is a front left suspension strut for Buick LaCrosse applications. It is calibrated to restore original ride control, steering response, and handling while maintaining the vehicle’s designed suspension behavior.
Key Features
- KYB recommended OE replacement strut
- Nitrogen gas-charged, twin-tube design
- 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
- Electronic safety systems depend on suspension performance staying within factory design; this strut helps preserve that behavior
- Recommended KYB strut mount: SM5610
- Recommended KYB strut boot: SB103
Product Details
The KYB Excel-G line is built on KYB OE assembly lines using OE-quality components and is classified as an Original Equipment for the Aftermarket replacement. This KYB 339378 strut is engineered for the front left position on 2010-2016 Buick LaCrosse models listed below, including 2010-2011 Buick LaCrosse, front left; 2012-2013 Buick LaCrosse, front left; and 2014-2016 Buick LaCrosse, front left. This part cross-references Monroe Shocks & Struts 72529 for the same application.
What It Helps Address
- Excessive bounce or poor damping at the front left corner
- Loose steering feel or delayed lane-change response
- Uneven tire contact caused by worn suspension control
- Noise and vibration from a fatigued strut assembly
- Reduced stability during braking and cornering
Installation Notes
Verify fitment by year, model, and suspension package before installation. This strut is for the front left position and is not listed for electronic suspension or sport suspension applications where noted. KYB recommends replacing the strut mount with SM5610 and adding a strut boot, part number SB103, to help protect the new strut from dirt, debris, and salt.
Quality Assurance
KYB is a major OE supplier, and the Excel-G line is built to restore factory-designed ride control rather than alter it. The part number 339378 is manufactured to OE-style standards for Buick LaCrosse suspension service.
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 2016 | Buick | LaCrosse | FWD | Front Left | Recommended OEM Replacement; (Except Electronic Suspension); Excel-G |
| 2015 | Buick | LaCrosse | FWD | Front Left | Recommended OEM Replacement; (Except Electronic Suspension); Excel-G |
| 2014 | Buick | LaCrosse | FWD | Front Left | Recommended OEM Replacement; (Except Electronic Suspension); Excel-G |
| 2013 | Buick | LaCrosse | — | Front Left | Recommended OEM Replacement; (Exc. Electronic Suspension); Excel-G |
| 2012 | Buick | LaCrosse | — | Front Left | Recommended OEM Replacement; (Exc. Electronic Suspension); Excel-G |
| 2011 | Buick | LaCrosse | FWD | Front Left | Recommended OEM Replacement; (Exc. Electronic and Sport Suspension); Excel-G |
| 2010 | Buick | LaCrosse | FWD | Front Left | Recommended OEM Replacement; (Exc. Electronic and Sport Suspension); Excel-G |
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