Tesla Roadster

PEM Motor Block Upgrade

This injection molded ABS plastic connector block becomes increasingly more brittle with age. Repeated loosening and re-torquing of the 8MM bolts connecting the 3Ø AC Induction Drive Motor to the PEM, usually performed annually, eventually weakens this connector block, and prevents a solid connection to the Motor.

This PEM output port is the high amperage, high voltage, connection to the Drive Motor which propels the car.

Three square captivator nuts, loosely recessed into this connector block, eventually place enough stress onto the connector block during loosening or tightening. This results in cracking of the ABS square nut captivator pocket, and in severe cases as shown, the block crumbles.

The injection mold for this assembly is long gone, and the most cost effective way to reproduce this part in small quantities is 3D printing. Our Machine Shop modifies the PEM output Motor Drive Control bus bar by inserting pem-nuts into the bus. The stress is now relocated onto a much stronger copper bus bar shown below.

We also offer a complete PEM upgrade and rebuild

PEM Rebuild Info

Tesla Service Center

Gruber Motor Company is an independent Electric Vehicle Service Center specializing in Tesla vehicles, with extensive experience in the diagnostics, repair, maintenance, and restoration of Tesla electric vehicles.

As electric vehicles continue to transform the automotive industry, servicing them requires a new kind of expertise. Today’s advanced EV service centers increasingly combine traditional automotive repair with the capabilities of an electronics and engineering laboratory. Gruber Motor Company brings decades of experience servicing critical power systems, high-voltage electronics, battery systems, and power conversion equipment—technologies that share many of the same fundamentals found in modern electric vehicles.

Operating from our 18,000-square-foot service facility in Phoenix, Arizona, our engineers and technicians provide advanced EV diagnostics and repair while maintaining the personalized customer service of a traditional specialty automotive shop. We are particularly known for our expertise with the original Tesla Roadster, including battery systems, power electronics, diagnostics, component repair, restoration, and vehicle preservation.

In addition to specialized Tesla and EV services, Gruber Motor Company provides complete automotive support, including tires, brakes, suspension service, detailing, paint correction, powder coating, paint protection film (clear bra), cosmetic restoration, and vehicle upgrades.

Whether your Tesla requires routine maintenance, advanced electrical diagnostics, battery or power-electronics repair, or a comprehensive restoration, our goal is simple: provide knowledgeable service, clear communication, and solutions that keep these pioneering electric vehicles on the road.

We are proud of our EV Service Center of the Future

Our EV Lab is where Software and Electronics repairs take place

Gruber Motor Company
203 West Lone Cactus
Phoenix, Arizona 85027
EV@GRUBER>COM

602-863-2655 X500

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