Vehicle Compatibility: This rear left tailgate power lift support is compatible with 2011-2012 Jeep Grand Cherokee WK2 Series. Replacement Part Number: 55399277AD, 55399277AC, 55399277AE, and 55399277AF. Please confirm your model for a precise fit. High-Quality Motor: This left tailgate power lift support is equipped with a 72W high-power motor and precision spring rod to minimize shock and ensure quiet motion. The dual-row 6-pin connector and spherical joint ensure smooth, hassle-free installation. Durable & Sturdy: Upgrade your vehicle with this durable rear tailgate power lift support strut, built to withstand extreme temperatures from -86°F to 176°F. The impact-resistant, corrosion-proof steel body ensures long-lasting durability and prevents deformation, keeping your liftgate functioning smoothly for years. Strong Support: With 408N strong support, our rear tailgate power lift support shock strut opens and closes your tailgate smoothly and securely within 5-8 seconds, reducing wear on hinges, and the rear hatch liftgate strut has passed 30,000 fatigue tests for enhanced safety. Built to Last: Crafted from premium steel, our liftgate actuator features flexible rubber cover and other rubber pieces that protect against leakage and dust entry. FEP corrosion and wear-resistant wiring protects internal components, minimizing the risk of accidental damage.