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Independent EV Repair Specialists

When an electric vehicle fails out of warranty, dealers often quote full battery or component replacement running into the tens of thousands. A small number of independent specialists do something different — they diagnose, repair, and rebuild high-voltage systems at a fraction of that cost, and they document the work in the open.

This is a curated guide to two of the best, organized by repair topic, so you can see what is actually possible before you accept a dealer’s quote.

Important. EV Risk Index curates these channels as independent educational resources. We are not affiliated with, sponsored by, or paid by either channel. This content is for understanding how EV faults are diagnosed and what repair options exist — it is not step-by-step instruction. High-voltage battery and electrical work can be fatal and must only be carried out by qualified EV technicians with the correct training and equipment. Do not attempt high-voltage repairs yourself.

OGS Mechanics

United Kingdom · Independent EV workshop

A UK independent garage specializing in high-voltage battery, motor, and electrical diagnostics — frequently on out-of-warranty, auction, or written-off EVs that main dealers have given up on. Known for long-form, transparent teardown and repair documentation across Jaguar, Nissan, Porsche, Audi, BMW, and more.

Visit OGS Mechanics on YouTube →

Gruber Motor Company

Phoenix, Arizona, USA · Tesla repair specialist

A long-established US independent specialist best known for Tesla Model S, Roadster, and drivetrain work — high-voltage battery repair, MCU/eMMC screen failures, drive units, and 12V systems — alongside clear educational teardowns of how Tesla packs are built and serviced.

Visit Gruber Motor Company on YouTube →

High-Voltage Battery Repair & Rebuilds

Pack rebuilds, module and cell replacement, and balancing — plus the out-of-warranty cost reality dealers rarely explain.

High-Voltage Diagnostics & Electrical Faults

How isolation faults, pre-charge faults and dead-pack mysteries are actually diagnosed. High-voltage work is for trained technicians only.

Drive Motors & Drivetrain

Motor failures, coolant ingress, bearing damage and drive-unit teardowns across multiple EV platforms.

Infotainment & MCU Screen — Tesla Model S

The eMMC/MCU failure on early Model S, and the repair-versus-replace options. Includes a full removal walkthrough.

12V & Low-Voltage Systems

The small battery that strands big EVs — warning signs, replacement and why it matters.

How EVs Are Built — Teardowns & Owner Education

Understand your battery's architecture, serviceability and longevity straight from the people who open them up.

Charging, Recovery & Other Repairs

Deep-discharge recovery, body and structural repair, and other ownership-relevant fixes.

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OGS Mechanics

Part 4:🔋 Audi e-tron Back to Life! ⚡ | Manually Charging a High Voltage Battery After 6 Months 🚗

Watch on YouTube →

Disclaimer. EV Risk Index is an independent editorial publication. The risk scores, recall information, ownership guidance, and other content on this site are provided for informational purposes only and do not constitute mechanical, legal, financial, warranty, or safety advice. We are not mechanics, lawyers, financial advisors, or licensed automotive inspectors. The third-party videos linked here are the work and opinions of their respective creators; EV Risk Index does not endorse, verify, or take responsibility for the procedures shown. Before making any vehicle purchase, repair, or ownership decision, readers should consult qualified professionals and verify all recall and safety information directly with the relevant regulators (NHTSA, Transport Canada, DVSA, EU Safety Gate, KBA, or Rappel Conso). Read full disclaimer →