Tailgate Hydraulic Strut (RH) for Tesla Model 3 (2017-2023) | 1551489-00-B

1. Core Function Description

1. Precision Lifting & Support: Uses high-pressure hydraulic oil and a nitrogen-charged cylinder to provide consistent upward force, supporting the tailgate (≈25kg weight) in any open position (from 15° to full 90°) without sagging. It eliminates the need for manual holding, ensuring convenient loading/unloading.
2. Smooth Opening/Closing: Features a multi-stage damping valve that controls the strut’s extension/retraction speed—opening at a steady 5mm/s to avoid sudden popping, and closing at a gentle 3mm/s to prevent slamming, protecting the tailgate and body from impact damage.
3. Environmental Resistance: The cylinder is made of seamless stainless steel with a PTFE (polytetrafluoroethylene) coating, and the piston rod uses chrome-plated hardened steel. Both materials resist corrosion from road salt, rain, and high humidity, ensuring performance in -40℃ to 80℃ environments.

2. Specification Parameter Table

3. Fault Judgment (Signs for Replacement)

• Tailgate Sagging: The tailgate slowly drops when opened (e.g., from full 90° to 60° within 30 seconds) – caused by nitrogen leakage or hydraulic oil loss, reducing support force.
• Stiff/Noisy Operation: Opening the tailgate requires excessive force (more than 50N), or there’s a "hissing" sound (nitrogen leakage) or "scraping" sound (worn piston rod seal) during movement.
• Visible Damage: Cylinder surface rust, piston rod scratches, or oil leakage (wet spots on the strut body) – these destroy the hydraulic seal and lead to complete failure.
• Uneven Opening: The tailgate tilts to the left when open (since the RH strut can’t match the LH strut’s force), causing misalignment with the body and difficulty closing.

4. Advantages of OEM-Grade (vs. Generic Products)

5. Installation Details

5.1 Package Contents

• 1× RH tailgate hydraulic strut (1551489-00-B)
• 2× High-strength mounting bolts (M8×16mm, with anti-loose washers – matches factory thread)
• 1× Installation guide (with step-by-step photos of bracket alignment)
• 1× Alcohol wipe (for cleaning old oil/grease from mounting points)

5.2 Required Tools

• Socket wrench (10mm, for removing old bolts)
• Torque wrench (to set bolt tightness)
• Flathead screwdriver (optional, for prying old strut from brackets)
• Gloves (to protect hands from residual hydraulic oil)

5.3 Installation Precautions

1. Safety First: Support the tailgate with a sturdy prop (e.g., a wooden rod) before removing the old strut – prevent the tailgate from dropping and causing injury.
2. Removal Order: First remove the bolt from the tailgate-side bracket (top end of the strut), then the bolt from the body-side bracket (bottom end) – avoid twisting the strut.
3. Alignment Check: Ensure the new strut’s mounting holes align with the factory brackets; do not force the strut (misalignment may bend the rod).
4. Torque Setting: Tighten the new bolts to 8±1Nm – over-tightening will damage the bracket plastic, while under-tightening causes rattling.

6. After-Sales Support

• Warranty: 2-year/40,000-kilometer warranty (whichever comes first), covering defects like oil leakage, force loss, or rod rust (excludes damage from improper installation or impact).
• Technical Assistance: Tesla-certified technicians available via email/chat to answer questions (e.g., bracket alignment, strut force testing).
• Compatibility Guarantee: 7-day return policy if the strut is incompatible with your 2017-2023 Model 3 (provided unused and in original packaging).

7. Conversion Guidance

• Pairing Note: For full tailgate performance, replace both RH (1551489-00-B) and LH (1551488-00-B) struts together – mixing old and new struts causes uneven force and premature failure.
• Bulk Inquiries: Repair shops or fleet managers can contact our team via "Contact Us" for discounted pricing on 10+ unit orders, with free shipping included.

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