Tesla Model X / Model X Plaid (2021+) Billet Rear Traction Arm Set (Upper Fore Link)

It replaces the rear upper fore link, Tesla part number 1420421-00-D, two per car. This is a direct-fit swap and arrives as a pair so both sides are done together. Ordering against the exact factory number keeps the installation clean with no adaptation required.

They are CNC-milled from 6061 aluminum with sealed spherical bushings, and the design is FEA-optimized for static, dynamic, and fatigue strength. That gives a strong, lightweight arm that locates the wheel precisely and runs silently. It shares its build approach with the rest of our Model X rear arm lineup, all developed to survive hard use before public release.

Through our Model X Plaid suspension program, which kicked off in June 2021 with the ‘Dark Helmet’ race car. That effort brought home a Pikes Peak class victory and multiple production-based EV lap records. Every arm starts as a precision 3D scan of the car’s suspension, then gets validated through real racing and street use on our own vehicles before it ships. This is race-tested hardware.

Yes. Our Hawthorne team can fit these and verify the rear alignment afterward; request a quote on the product page. They ship the next business day, so the wait is short. If you are outside Los Angeles, any shop familiar with the Model X rear suspension can perform what is a direct-replacement job.

Not by themselves. Under the Magnuson-Moss Warranty Act, Tesla has to prove that these arms caused a specific failure before denying a claim, rather than pointing to their presence. Our race record and warranty stand behind them. Keep the factory arms you remove and returning to stock is always straightforward if a question arises.

Because the rear axle behaves best when its links share the same precision. We recommend pairing this arm with the rear lower fore link and the adjustable camber and toe arms, so every part of the rear locates the wheel consistently. Fitted alone it upgrades one link; fitted as a group it transforms how the whole rear end feels.

No. The upper fore link is about strength and precise location while saving weight, not adjustable settings. If you want to change rear camber or toe, those come from the dedicated adjustable arms. Choose this piece to make the rear suspension feel tighter and more durable, and add the adjustable arms separately when alignment tuning is the goal.

Somewhat, though it is subtler than a sway bar or a lowering kit. Firmer, more precise rear location makes the Model X feel more connected and composed, particularly under acceleration and through faster corners. A driver tuned into how the car behaves will notice it. Someone chasing maximum ride softness may prefer the factory bushings’ extra give.

It is one of the locating arms in the Model X’s rear multi-link setup, part of managing how the wheel is held through its travel. Replacing it with a billet aluminum arm on sealed spherical bushings firms up that location and improves driving feel and durability. Across the 5-link rear end, this arm contributes to how securely the back of the car tracks under power and through corners.

It fits the 2021+ Model X and Model X Plaid, which share the new 5-link rear suspension we re-engineered for performance driving. At $653.81, down from $795.00, it carries SKU UP-MSMX2-114-1.1 and ships out the following business day. One set covers both trims.

Tesla’s warranty covers factory-installed parts, but it does not automatically void your warranty if you install aftermarket components like Unplugged Performance brake kits. Under U.S. law (Magnuson-Moss Warranty Act), Tesla must prove that an aftermarket part caused a failure in order to deny warranty coverage. Our parts are engineered to work harmoniously with Tesla OEM Brake systems and can be professionally installed by Unplugged Performance in Hawthorne, CA or by an authorized installer to minimize risk. That said, any damage directly caused by misuse or improper installation may not be covered. We recommend retaining all factory parts so you can revert to stock if needed. Many Tesla owners enjoy peace of mind by using Unplugged Performance products, which are extensively tested and installed by certified professionals. If warranty concerns are top-of-mind, our team can help clarify compatibility and installation best practices to ensure a worry-free experience.

Unplugged Performance offers a comprehensive warranty on all parts and installations performed by our certified technicians. Warranty coverage applies to defects in materials and workmanship on items including lowering springs, coilovers, big brake kits, brake pads, stainless steel brake lines, shocks, and more. Should any covered part fail under normal use or display premature wear, we will repair or replace it at no additional cost—assuming the component was installed by us or at one of our authorized partners.

This warranty is valid for 2 years or 24,000 miles, whichever comes first, excluding consumable products like brake pads, rotors, and tires, starting from the installation date. Coverage extends to labor for warranty repairs when performed by Unplugged Performance or an authorized installer. It does not cover damage resulting from misuse, accidents, off‑road use, improper installation not done by us, or modifications that aren’t factory-approved.

To file a warranty claim, simply contact our service team. We’ll guide you through inspection, shipping (if needed), and repair or replacement logistics. transparencia and top-tier support are what you can expect from Unplugged.

Installing aftermarket parts does not automatically void your Tesla warranty. Under the Magnusson-Moss Warranty Act (www.sema.org/sema-enews/2011/01/ftc-validates-right-to-install-aftermarket-parts), a manufacturer cannot void your warranty simply because you installed aftermarket parts. Tesla must prove that the aftermarket part caused the specific failure in question to deny a warranty claim. UP recommends retaining all factory parts to allow reverting to stock if needed. 

To find authorized installers or retailers of Unplugged Performance products in your area, please use the form on our website to provide your location details. This will help us connect you with an authorized installer nearby. You can find the form here.

Unplugged Performance processes orders quickly, typically within 1–2 business days after placement. For U.S. customers, orders under $50 usually ship via FedEx SmartPost with an estimated delivery time of 2–7 business days. Larger items like body kits or bumpers may ship via freight carriers with curbside delivery; customers will be contacted to schedule a delivery window. International shipping is available to most countries, with shipping costs calculated at checkout. Delivery times abroad vary, generally ranging from 5 to 16 business days depending on destination. Import duties or taxes are the customer’s responsibility. To ensure a smooth shipping experience, provide accurate contact information during checkout. For specific questions or shipping quotes, Unplugged Performance’s support team is available to assist.