2021+ Model S / Model S Plaid – Lexan Window Glass Replacement

Fitting all three options can shave about 23.5lbs, roughly 10.65kg, from a 2021+ Model S or Plaid. The front door Lexan is 46% lighter than stock, 7.6lbs versus 14.0lbs, the rear door Lexan is 48% lighter at 7.2lbs versus 14.0lbs, and the rear windshield is 48% lighter at 11.0lbs versus 21.0lbs. Removing weight up high like this is a favorite move for anyone racing their Plaid.

Lexan is a lightweight polycarbonate used in place of heavy automotive glass to cut weight. On this application each panel weighs roughly half its factory glass counterpart, which is why swapping the front doors, rear doors, and rear windshield removes about 23.5lbs total. Less mass, especially up high in the body, lowers the car’s effective center of gravity and is why this is aimed at track and race use rather than daily comfort.

Three options are offered for the 2021+ Model S and Model S Plaid: front door pair, rear door pair, and the rear windshield. You can buy them individually or together. The front doors save 6.4lbs, the rear doors save 6.8lbs, and the rear windshield saves 10.0lbs, adding up to about 23.5lbs if you do all three. Choose based on how aggressively you want to strip weight.

This is a weight-reduction upgrade aimed at owners racing their Model S Plaid, not a comfort or convenience item. Polycarbonate windows are about cutting mass to help performance, so they make the most sense on a track-focused or competition build. If your priority is a quiet, plush daily driver, this is not the upgrade for you; it is for the driver chasing lap times and a lower curb weight.

The rear windshield alone drops 10.0lbs, going from the stock 21.0lbs to 11.0lbs, a 48% reduction. Because it sits high and toward the back of the car, that is a meaningful place to remove mass for handling. If you want the single biggest weight saving from one panel in this lineup, the rear windshield is it, and you can order it without the door sets.

Local owners can have them professionally installed by Unplugged Performance in Hawthorne, CA, and our team will quote the work and schedule it. Window replacement is more involved than a simple bolt-on, since panels must be fitted correctly to seal and sit right, so many owners prefer to have it done. If you are experienced with body and glass work you may tackle it yourself, but professional fitment gives the cleanest result.

They target different weight. Lighter forged wheels remove unsprung, rotating mass, which sharpens acceleration and braking as well as ride quality. Lexan windows remove body weight up high, lowering the center of gravity, and can strip about 23.5lbs. Serious builders often do both, and pair them with aero such as the Ascension-RR rear carbon fiber wing; if you already run light wheels and want the next weight reduction for a race car, the windows attack mass that wheels cannot touch.

Removing about 23.5lbs of upper-body mass lowers the effective center of gravity and reduces the weight the car has to accelerate and stop, which helps on track. It is one piece of a broader lightening strategy rather than a single dramatic gain. Paired with lighter wheels, a carbon fiber long tail trunk, and other weight savings on a Plaid build, the effect adds up where it matters most, in the corners.

The kit is offered as front door pairs, rear door pairs, and the rear windshield as weight-saving replacements for a performance-focused build. Because these are race-oriented polycarbonate panels rather than OEM glass, we recommend confirming operation and fitment details for your specific configuration with our team when you order, and having them installed by Unplugged Performance for the correct result on your car.

Swapping in aftermarket windows does not automatically void your Tesla warranty. Under the Magnuson-Moss Warranty Act, Tesla must show that the aftermarket part caused a specific failure to deny a related claim, so keep your factory glass in case you want to return to stock. Since this is a track and race-focused change, retaining the OEM panels also makes it easy to revert the car for daily use.

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.