Tesla Model S / Model S Plaid (2021 – 2026+) Billet Rear Traction Arm Set (Upper Fore Link)

It is one of the five links in the 2021+ Model S rear suspension, and it helps locate the rear hub fore and aft under acceleration and braking. When the factory link’s rubber bushings flex, the rear wheel moves slightly under load, which softens response and can let alignment wander. This billet upper fore link with sealed spherical bushings holds that location firmly, so power goes down with less slop.

It replaces the factory link, Tesla part number 1420421-00-D, with a stronger, lighter billet aluminum arm carrying high-performance sealed spherical bushings instead of rubber. The upgraded bushings run silent while sharpening handling feel and improving durability. Tesla’s new 5-link rear end is capable, and this is our re-engineered version of one of those links for performance driving. Same job, far less deflection.

Both. It fits the 2021 through 2026+ Model S Plaid and Long Range, since they share the rear suspension. It is not a pre-2021 part, because the 5-link rear layout arrived with the refreshed car. If you have a 2021-or-newer Model S of either trim, this traction arm set bolts into the upper fore position as a direct replacement.

It is CNC-milled from 6061 aluminum for maximum strength at low weight, and the design was FEA-simulation optimized for static, dynamic, and fatigue strength before production. The sealed spherical bushings give precision and durability with silent operation. Every one of our rear arms starts from a precision 3D scan of the car’s suspension, then gets validated through real racing and street use on our own vehicles.

You can add them individually, but the rear works best as a system. We recommend pairing this traction arm with the rest of the rear suite: the adjustable camber arm, the adjustable toe arm, the trailing arm, the billet lower fore link, and the adjustable sway bar. Doing the full rear at once means one install and one alignment, and every link is then holding its location instead of a mix of billet and worn rubber.

Mostly a performance upgrade. Where the front lower compliance arms exist largely to cure worn, knocking factory bushings, this rear traction arm is chosen to tighten how the rear end puts down power and holds alignment. You would fit it to make a healthy car sharper, not only to silence an old one. That said, the sealed spherical bushings also outlast the soft factory rubber, so you get durability alongside the feel.

For a competent home mechanic with a lift and hand tools, a single rear link is a reasonable job, and it ships the next business day. Plan a rear alignment afterward, especially if you are also fitting the adjustable camber and toe arms. Owners in the Los Angeles area can have our Hawthorne team install and align the rear suite together, which is the tidiest way to do the whole set at once.

On Dark Helmet, our Model S Plaid race car, where our rear suspension program began in June 2021. That car brought home a Pikes Peak class victory and multiple production-based EV lap records, and the parts that made it fast are the ones we put into production. The race results and our warranty are the reason we stand behind these as the best available for the car.

It helps by keeping the rear wheel located under hard acceleration. When the stock rubber bushings deflect, the contact patch shifts slightly and the car can feel less planted launching all that power. A rigid upper fore link holds the geometry, so the tire stays where it should. On a 1,020hp Plaid that already struggles to use its output, tighter rear location is a meaningful gain, and it is one reason this arm is bundled into our full suspension package.

No, not automatically. Under Magnuson-Moss, Tesla must demonstrate that the arm caused a specific failure before denying a related warranty claim, so installing it is not grounds for blanket denial. Keep the factory link you remove in case you want to return to stock. These arms also carry our own suspension warranty, which is part of why we consider them a safe long-term upgrade.

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.