Poznex · Baranowo near Poznań
Tesla battery and high-voltage (HV) system repair
Rolna 29A, 62-081 Baranowo near Poznań Mon-Fri 9:00-18:00 5,0 on Google · 14 reviews
We repair high-voltage (HV) batteries in the Tesla Model S and Model X, as well as the Model 3 and Model Y: we replace cells and sections, BMS and BMB boards, fix loss of HV isolation and Smart Fuse failures, and reseal the casing with a nitrogen pressure (leak) test. In most cases we advise replacing the battery - it is the more durable solution; we carry out a repair when it makes sense. Estimated prices: module refurbishment for the Model S/X (up to 2022) from 10 500 PLN, BMS board 2 000 - 4 000 PLN, HV isolation fault / Smart Fuse repair 1 200 - 6 000 PLN; we confirm the exact cost and time after diagnostics, always before any work starts. Poznex, an independent Tesla service at Rolna 29A, Baranowo near Poznań, phone +48 662 189 700.
Professional repair of Tesla Model S, 3, X and Y high-voltage batteries.
We work on modules, cells, BMS boards, isolation faults and the cooling system, strictly following factory safety standards.
- Section refurbishment and cell replacement
- BMS and BMB board replacement
- Casing sealing and nitrogen leak test
Scope of work and faults we fix
Module and BMS repair
- Replacing damaged cells
- Restoring cell balance
- BMS board refurbishment and programming
Fixing isolation faults
- BMS_w151 / BMS_f151 (loss of HV isolation)
- BMS_w107 / BMS_f107 (cell voltage measurement circuit faults)
- BMS_u031 / BMS_w176 (Smart Fuse failure)
How is the battery repaired?
- 1. Initial diagnostics. Locating the damage and reading the BMS fault log precisely.
- 2. Battery removal. Lowering the battery pack from under the car on a dedicated hydraulic battery lift.
- 3. Clean room work. Opening the casing in a dust-free area, following high-voltage health and safety rules.
- 4. Repair and sealing. Replacing sections/BMS, resealing the casing and a nitrogen pressure (leak) test.
HV battery repair prices
| Scope of work | Estimated price | Time | Booking |
|---|---|---|---|
| Module refurbishment (Model S/X up to 2022) | from 10 500 PLN | Time: after diagnostics | |
| BMS board replacement / cloning | 2 000 - 4 000 PLN | Time: after diagnostics | |
| BMB board replacement in modules | 6 000 - 12 000 PLN | Time: after diagnostics | |
| HV isolation fault / Smart Fuse repair | 1 200 - 6 000 PLN | Time: after diagnostics | |
| Cooling system flush | 250 - 2 700 PLN | Time: after diagnostics |
Prices are estimates - we give the exact cost after diagnostics and always before any work begins.
Frequently asked questions
Can the HV battery in a Tesla Model S or Model X be repaired instead of replaced?
Sometimes, yes - we work at the level of cells, sections (modules) and BMS/BMB boards. Usually, however, we advise replacing the battery: it is the more durable solution, and we treat repair as a last resort. We will tell you what makes sense for your car after diagnostics, before we give you a price.
How much does HV battery repair cost for a Tesla Model S/X?
Estimated prices: module refurbishment (Model S/X up to 2022) from 10 500 PLN, BMS board replacement or cloning 2 000 - 4 000 PLN, BMB board replacement in modules 6 000 - 12 000 PLN, HV isolation fault / Smart Fuse repair 1 200 - 6 000 PLN, cooling system flush 250 - 2 700 PLN. We confirm the exact cost after diagnostics and always before any work starts.
How long does an HV battery repair take?
Module refurbishment usually takes 4-10 days, a BMS board replacement usually 1 day. We give you the exact time after diagnostics, together with the price, before any work starts.
Which battery and BMS faults do you fix?
Among others BMS_w151 / BMS_f151 (loss of HV isolation), BMS_w107 / BMS_f107 (cell voltage measurement circuit faults) and BMS_u031 / BMS_w176 (Smart Fuse failure). If your screen shows a different battery message, describe it in the form or call +48 662 189 700.
Do I need diagnostics before a battery repair?
Yes, every repair starts with initial diagnostics: we locate the damage and read the BMS fault log. Only then do we give you the cost and time, and we start the repair once you agree. We agree the scope and cost of the diagnostics when you book - call +48 662 189 700.
What warranty do you give on a battery repair?
We discuss the terms individually when we quote, before we start work - call +48 662 189 700 or leave your number in the form. How we look after our customers is best shown by their reviews on Google.
Other Tesla services
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Briefly describe the model and the problem. We reply during opening hours, usually the same day.
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+48 662 189 700Last updated: 24 September 2026 · Written by the Poznex workshop team.