Product Specification

Rear Left/Right Door Check Strap for Tesla Model 3 (2017-2023) | 1089509-00-B

1. Key Specifications & Compatibility

2. Why This Brand-Grade Check Strap Is Critical for Your Model 3’s Rear Doors

1. Prevents Over-Swing Damage: Limits the rear door’s maximum opening angle to ~60° (factory standard), stopping it from hitting parking curbs, garage walls, or even small passengers near the rear (a key safety detail for families). It also avoids dents to the rear door edge or scratches to the B-pillar paint.
2. Secures Door for Daily Use: Features built-in "detent points" that hold the rear door at 25° and 40° open positions. This keeps the door steady when loading groceries, strollers, or luggage into the rear, and prevents it from slamming shut on hands when helping kids or elderly passengers get in/out.
3. Reduces Hinge & Seal Wear: Distributes the rear door’s weight evenly when open, avoiding excessive strain on rear door hinges (a common cause of squeaking) and door seals (prevents water leaks or wind noise from worn seals in Model 3s with faulty check straps).

3. What It Actually Does (No Tech Jargon)

• Stops Wide Swings: When you open the rear door, the strap tightens at the maximum safe angle—no more accidentally hitting the door on a parking curb or bumping it into a shopping cart.
• Holds Door Steady: If you prop the rear door open to load a suitcase, the strap "clicks" into place and keeps it from blowing shut in wind or rolling closed on a sloped driveway.
• Feels Like Factory: Unlike flimsy generic straps, this one moves smoothly with the rear door—no jerky motions, squeaks, or stretching. Closing the rear door feels tight and secure, just like when your Model 3 was new.
• Tough for Daily Use: The reinforced webbing doesn’t fray (even if you open the rear door 15+ times a day for passengers or cargo) and the steel hardware won’t rust from rain, snow, or road salt.

4. Signs Yours Needs Replacement

• Rear Door Opens Too Wide: The rear door swings past its normal 60° angle and may hit objects, feel unstable, or scrape against the B-pillar.
• Door Won’t Stay Open: The rear door closes on its own when parked on slopes, or won’t hold in partial-open positions (e.g., slides shut in light wind).
• Loose/Wobbly Door: The rear door feels "floppy" when opening/closing—you may hear rattling or clicking from the B-pillar area.
• Visible Damage: The strap is frayed, torn, or stretched; or the mounting hardware is rusted, loose, or missing.
• Squeaking Noises: Loud squeaks come from the rear door area when opening/closing (caused by a worn strap rubbing against the B-pillar or hardware).

5. Why This Brand-Grade Strap Outperforms Generic Alternatives

• Tesla-Spec Durability: Uses multi-layer polyester webbing (same thickness and tensile strength as factory standards) instead of thin nylon (which stretches or tears in 5–10 months). The steel hardware has anti-corrosion plating (unlike generic bolts that rust and seize in the B-pillar over time).
• Perfect Fit, No Mods: Mounts using Model 3’s original bolt holes in the rear door and B-pillar—no drilling, trimming, or adjustments to the door frame. The included rubber buffer matches the factory’s noise-dampening design (avoids rear door rattle when driving on highways).
• Factory-Like Detent Points: Calibrated to hold the rear door at the same 25°/40° positions as the original strap (generic straps often have too-loose or misaligned detents that won’t keep the door steady).
• Long-Lasting Performance: Resists UV damage (won’t fade or crack in direct sunlight) and moisture (works in heavy rain, snow, or humidity)—built to last 5+ years, vs. 1–2 years for generic alternatives.

6. Installation & What You Receive

• 1x Rear Left/Right Door Check Strap (1089509-00-B)
• 2x Brand-spec steel mounting bolts (torque specs align with Tesla’s official service manual: 24 Nm for body-side bolts, 10 Nm for door-side nuts)
• 1x Rubber vibration-dampening buffer
• Digital Installation Guide: Step-by-step photos, how to safely remove the rear door panel (using plastic trim tools to avoid breaking interior clips), locate factory mounting points in the B-pillar, and install the new strap—no special tools needed (a socket wrench, T40 bit, and flathead screwdriver suffice).

7. After-Sales Support

• Warranty: Backed by a limited warranty. For detailed coverage terms (e.g., duration, eligible defects like strap tearing or hardware corrosion), please reach out to our team.
• Technical Assistance: Our EV specialists have experience with Model 3 rear door systems—they’re available via email or chat to answer installation questions (e.g., "how to access B-pillar mounting points" or "how to confirm torque specs") and help you complete the process smoothly.