Rear Suspension Knuckle - Left for Tesla Model X (2015-2021) | 1027411-00-D
The Silent Stabilizer of Your Model X’s Rear End
For Tesla Model X owners, the left rear suspension knuckle is the unsung hero that keeps the SUV grounded—especially when the going gets tough. Whether you’re loaded with camping gear for a weekend trip, navigating a bumpy dirt road, or simply cruising the highway with the family, the 1027411-00-D works behind the scenes to maintain stability. Unlike one-size-fits-all parts, this knuckle is tailor-made for 2015-2021 Model X, accounting for its unique rear weight distribution (thanks to the battery pack) and 67.7-inch rear track width. It’s not just a metal piece—it’s the backbone of your SUV’s rear-end control.
How It Shapes Your Driving Experience
The Model X’s versatility demands a rear knuckle that can keep up, and this one delivers in every scenario:
- Heavy Load Mastery: When you’ve got a full cabin and cargo area, the knuckle bears the extra weight (up to 1,800 lbs on the left rear) without bending, ensuring your tires stay evenly planted on the road.
- Towing Confidence: Hauling a trailer? It absorbs the twisting forces from the hitch, preventing the rear end from swaying and keeping your steering steady.
- Smooth Rides Over Rough Terrain: Potholes, speed bumps, or gravel—this knuckle distributes the impact across the rear suspension links, turning jarring jolts into manageable vibrations.
When Your Model X Tells You It’s Time to Replace
Your SUV gives clear signals when the left rear knuckle is failing—don’t ignore them:
- Uneven Tire Wear: The left rear tire’s inner or outer edge is wearing out faster than the right? That’s the knuckle’s alignment gone off, a sign it’s warped from stress.
- Rear End Shakes: At speeds above 60 mph, you feel a vibration in the back. A bent knuckle throws off the wheel’s balance, and letting it go can damage the hub bearing (a $300+ fix).
- Clunks When Braking: A dull “thud” from the left rear when you hit the brakes? Loose mounting points on the knuckle are to blame, and they’ll only get worse with time.
Why It Outlasts Aftermarket Alternatives
Aftermarket rear knuckles cut corners with thin steel or shoddy casting, but this one is built like a tank:
- Forged for Strength: Made from SAE 1045 high-carbon steel, heated and hammered to create a dense, fatigue-resistant structure. It handles the Model X’s weight without flexing, even after years of use.
- Precision Fit: CNC-machined to match Tesla’s exact specs (tolerance of ±0.02mm), so it bolts up perfectly to the control arms, hub, and brake assembly—no grinding or forcing required.
- Rust-Proof Armor: A 5-layer protective coating (including zinc and epoxy) stands up to 1,000 hours of salt spray testing. Whether you live by the ocean or in a snowy climate, it won’t rust or seize.
