"The biggest change is a modification with the rear motor, switching from an induction-type motor to a permanent-magnet design and optimizing the half-shafts, which shed about 100 pounds. Tesla also got "almost 80 pounds out of the interior bits and pieces," which "included making parts thinner, different manufacturing process choices, and incorporating airbag-deployment requirements into the headliner fabric," the report said."
"Additionally, the standard five-passenger, bench seat configuration saved 50 pounds by ditching pedestal mounting. This also helped with practicality, as it helped the seat fold flat. Engineers at Tesla also saved 44 pounds from the high-voltage wiring through optimizing the wiring from the charge-port DC/DC converter and switching from copper to aluminum wiring."
The 2026 Model X is about 400 pounds lighter through a series of engineering and manufacturing changes. The rear motor was changed from an induction-type unit to a permanent-magnet design and half-shafts were optimized, cutting roughly 100 pounds. Interior components were slimmed and reworked, removing almost 80 pounds, while the five-passenger bench-seat layout eliminated pedestal mounts to save 50 pounds and allow flat folding. High-voltage wiring was reduced by 44 pounds through wiring optimization and a switch from copper to aluminum. Cooling was simplified and megacastings saved weight while increasing torsional stiffness.
Read at TESLARATI
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