Tesla battery repair

Remote diagnosis, repair, and support for Tesla BMS charging faults.

If your Tesla reports BMS faults or maximum charge level reduced warnings, the problem is often tied to software, not hardware. Pack data, voltage imbalance, or battery management protection logic contribute to the warnings being displayed. We focus on identifying the root cause of these alerts, and then resolve these issues with digital corrections ( to qualifying BMS codes)

BMS errors we can usually repair remotely
  • BMS_u029, BMS_a079, BMS_a074, BMS_u066 and similar charging faults
  • Maximum charge level reduced alerts
  • Charge limit behavior faults tied to BMS logic
  • Pack data and balancing warnings that qualify for remote correction
Warnings that point to hardware faults we cannot address
  • High-voltage isolation faults, including BMS_u018
  • Persistent contactor failures
  • Physical module, sensor, or harness failures
  • Warnings that indicate direct hardware repair is required
Remote-first workflow

Diagnose the fault, confirm the cause, apply the right repair path.

  1. 1. Diagnose

    Review alerts, charging behavior, and pack data.

  2. 2. Confirm

    Separate software limits from physical hardware faults.

  3. 3. Repair

    Apply supported corrections and verify charging behavior.

For qualifying errors, diagnosis and repair can be handled remotely. Hardware faults require physical repair.

What causes BMS errors

Most battery faults start with bad data, imbalance, or a hardware issue the BMS is trying to protect.

Cell group voltage imbalance across the pack
Drifted pack measurements or learned limits inside the BMS
Intermittent harness, sensor, or communication faults
Battery management logic protecting the pack after abnormal data
Service pricing
$499.00
$999.00

Remote charging fault diagnosis and BMS repair for qualifying report codes.

Book service
Service coverage available
How we fix it
1. Review the fault profile

We start by identifying the exact warning behavior, charge symptoms, and diagnostic context around the BMS fault.

2. Separate software-limited issues from hardware failures

Some problems come from learned limits, imbalance, or data issues. Others point to sensors, harnesses, or battery components that need PHYSICAL repair.

3. Apply the right remote repair path

When the vehicle qualifies, we can remotely guide diagnostics, corrections, and service actions to clear faults and restore normal operation.

Remote repair works best

The issue can be fixed through diagnostics, pack management, and guided software actions.

Many BMS problems are not random. They happen because the vehicle sees conditions it considers unsafe or inconsistent, then limits charging or throws a fault. When the underlying cause is within a supported remote repair path, we can often help resolve the issue without requiring battery pack replacement or physical repair.

Pack comparison

Qualifying BMS charge faults often look like a limited pack before remote correction — and restored charge behavior after.

Tesla battery pack before remote BMS repair
Before
Active charge fault / reduced max charge
Tesla battery pack after remote BMS repair
After
No charge fault

Illustration: same pack photo with red (before) and green (after) treatment for clarity — not separate vehicle photos.

Service-mode access video (TikTok) — coming soon

BMS repair flow
Illustrated repair outcome
Battery state
Before repair: active charge fault
Limited rework
After 90 days, identical errors will be repaired for $99 per service call.
Codes and faults we can often fix
  • Most ‘Maximum Charge Level Reduced’ alerts.
Charging techniques to reduce repeat errors
  • Avoid staying parked at very low or high state of charge.
  • After service, charge your car to the instructed maximum IMMEDIATELY.
  • For daily use, keep a stable charge routine instead of irregular patterns.
  • Use scheduled charging at home where possible so the battery finishes charging when you are ready to go – it is not good to leave the battery standing still when fully charged.
  • Run regular full-charge/discharge calibration sessions when recommended by your service technician.
  • Follow your post-service charging guidance to reduce repeat fault behavior.
What this service does - and does not do
What we do
Review fault behavior and vehicle symptoms
Target BMS-related issues that can be addressed remotely
Guide the vehicle through the right diagnostic and service workflow
Help restore reliable battery operation when the underlying issue supports it
What we don't do
Repair physically damaged battery cells through software alone
Promise every battery warning can be cleared remotely
Ignore hardware faults that require in-person repair
Recommend unnecessary pack replacement without diagnosis