Tesla Semi Tease Hints At Big Changes Under The Hood

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Tesla Semi Tease Hints At Big Changes Under The Hood

In Brief

• Tesla has updated the Semi’s design to improve efficiency.
• Changes target aerodynamics and simpler manufacturing.
• Updates come as production nears and demand grows.

Ana Zirojević 2025-12-19

Tesla’s long-awaited Semi truck appears to be entering a critical new phase, with fresh hints pointing to meaningful improvements ahead of volume production.

As it happens, Tesla Semi Program Director Dan Priestley revealed in an X post on December 19 that the company has made notable changes to the all-electric Class 8 truck, following a broader design overhaul announced earlier this year.

Tesla Confirms Design Improvements for the Semi

After personally driving the updated Semi, Priestley said the improvements were clear and that customers are “going to love it.”

Just drove the redesigned Semi. Our customers are going to love it. https://t.co/KZ88sf1CDL

— Dan Priestley (@danWpriestley) December 19, 2025

Although Tesla hasn’t disclosed full technical details, the company previously confirmed several efficiency-driven changes during its 2025 Annual Shareholder Meeting.

These include a redesigned bumper with improved aerodynamic channels, a smoother roofline, and a smaller wraparound windshield to reduce drag.

Tesla also moved away from the original blade-style light bar design, signaling a shift toward manufacturing simplicity and real-world performance gains.

*Semi is awaiting mass volume production. Source: Tesla*

Production Timing and Customer Demand

The timing of these changes is significant. Tesla’s dedicated Semi factory at Gigafactory Nevada is nearing completion, with initial production phases expected to begin ahead of a broader ramp next year.

Major customers, including PepsiCo and Frito-Lay, have already been testing the Semi in real-world pilot programs, providing Tesla with extensive data on range, efficiency, and durability.

CEO Elon Musk has previously described demand for the Semi as “ridiculous,” suggesting order volumes could scale rapidly once production stabilizes.

Tesla itself will also be among the first major users, deploying the Semi to support its internal logistics operations.

While the design tweaks may appear subtle, they come from a program leader who has worked on the Semi since 2015. For a vehicle this complex, small changes can translate into major gains in efficiency, reliability, and scalability.

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Ana Zirojević Crypto journalist and market analyst with 7+ years of experience covering digital assets, blockchain technology, and data-driven market analysis.