S–02High-voltage & drive unit
High-voltage diagnostics &
drive-unit repair
High-voltage warnings and drive-unit faults need a trained diagnosis before anyone recommends a major assembly. We test the affected systems, explain the evidence, and give you a clear repair-or-replacement path.
SHOP RECORD / 02A Supported work
- 01High-voltage battery diagnostics and replacement
- 02Drive-unit and drivetrain diagnosis and repair
- 03Charging system and onboard charger service
- 04Contactors, DC-DC systems, and related controls
- 05High-voltage coolant and thermal management
- 06Honest guidance on repair versus replacement
B What brings vehicles in
- Reduced range, sudden range loss, or battery-service alerts
- The vehicle will not charge, charges slowly, or stops mid-session
- High-voltage isolation faults, contactor faults, or pyro-fuse warnings
- Drive-unit whine, vibration, or loss of power under acceleration
- Thermal-management errors or repeated overheating warnings
- Post-collision or flood concerns about high-voltage integrity
C Shop process
- High-voltage safety check and full battery/drivetrain scan
- Isolation testing, system data review, and physical inspection
- Itemized recommendation for the affected component or assembly
- Approved repair or replacement followed by drive and charging verification
What an independent specialist adds
A large high-voltage quote should come with evidence. We are not anti-replacement; we are anti-guesswork. If a contactor, onboard charger, DC-DC system, thermal component, drive unit, or battery assembly is the root cause, we will show you how the data supports the recommendation.
High-voltage systems demand factory training, proper protective equipment, documented lockout/tagout procedures, and tooling most garages do not carry. Our technicians bring that discipline to every diagnosis.
Battery work starts with data. We review fault codes, isolation readings, charging behavior, and thermal hardware before recommending battery replacement or related component service.
Drive units and charging systems follow the same diagnose-first approach. Front and rear drive units, onboard chargers, DC-DC converters, contactors, and high-voltage coolant loops are all within scope where service information, tooling, parts, and safety requirements allow.
We support Tesla and Rivian vehicles at Orlando and Amesbury. When a repair is not safe, sensible, insurable, or within our supported scope, we will say so and help you understand the next step.
What to send before the appointment
Use the service request for the location that will perform the work. Include the exact model and configuration, warning text, when the concern occurs, recent repair or collision history, charging context when relevant, and photographs or short videos that show the symptom.
A submitted work request is not a free quote or a confirmed appointment. The selected shop reviews the information, confirms the available next step, and explains the approved diagnostic scope. Diagnostic time is billed before a major repair estimate is presented.
Repair, replacement, or manufacturer service
The correct outcome is not always an independent repair. Warranty and recall concerns may belong with Tesla or Rivian. Some assemblies should be replaced when repair is not safe, sensible, supported, or insurable. The shop's role is to show how the evidence supports the recommendation and give the owner a clear decision.
Verification and handoff
Approved work is followed by the checks appropriate to the repair: inspection, measurement, charging observation, calibration context, road testing, fault review, or another documented verification step. The service record should identify what was addressed, any remaining condition, and the follow-up the owner needs to understand.
M Supported vehicle scope
Tesla and Rivian,
model by model.
Tesla
Model 3, Model Y, Model S, Model X, Cybertruck, original Roadster, and applicable legacy models.
Rivian
R1T, R1S, R2, and commercial EDVs within the shop's supported service scope.
Q Questions before booking
01DIRECT ANSWERDo you repair individual battery modules?
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No cell- or module-level pack work is represented in our public service scope. We provide high-voltage diagnostics, battery replacement, related component service, drive-unit work, and clear repair-versus-replacement guidance.
02DIRECT ANSWERDoes a high-voltage warning mean the battery must be replaced?
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Not necessarily. The warning identifies a condition, not automatically the failed component. Diagnosis can involve fault data, isolation readings, charging behavior, contactors, onboard charging, DC-DC systems, thermal management, wiring, controls, or the battery assembly.
03DIRECT ANSWERCan you repair Tesla drive units?
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Drive-unit diagnosis and repair is within our supported scope where the vehicle, parts, service information, tooling, and safety requirements allow. We explain the evidence and options before approved work begins.
GO Service intake
Start with the vehicle.
Then follow the evidence.
Choose the shop nearest you and send the service team the model, symptoms, warning details, and relevant repair history.
Choose your shop