Poznex · Baranowo near Poznań
Tesla computer diagnostics in Poznań
Rolna 29A, 62-081 Baranowo near Poznań Mon-Fri 9:00-18:00 5,0 on Google · 14 reviews
We carry out computer diagnostics on Teslas (Model 3, Y, S, X and Cybertruck) with Tesla Toolbox 3: reading active and stored fault codes, the condition of the HV battery and BMS, HV isolation, the drivetrain and cooling. With pre-purchase, before-the-warranty-expires and comprehensive diagnostics you get a written report with recommendations. Basic diagnostics cost 300 PLN and take 1-2 hours; pre-purchase diagnostics and diagnostics before the warranty expires from 650 PLN; comprehensive diagnostics with battery analysis and a road test 700 PLN (4-6 hours, free if we do the repair on the day of diagnostics). Poznex, an independent Tesla service at Rolna 29A, Baranowo near Poznań, Mon-Fri 9:00-18:00.
A full check of the high-voltage system, the battery and all electronic modules.
We detect hidden and active faults and assess the condition of the HV battery, BMS, drivetrain, electronics and safety systems.
- Basic diagnostics in 60-120 minutes
- Work on Tesla HV systems
- Report with recommendations for pre-purchase, before-the-warranty-expires and comprehensive diagnostics
Which systems do we check?
High-voltage (HV) system
- Battery condition
- Modules
- Isolation
- Fuses and contactors
BMS (Battery Management System)
- Cell balancing
- Voltage sensors
- Temperature sensors
Drivetrain
- Inverters
- Electric motors
- Gearboxes
Cooling system
- Leaks
- Performance
- Pumps and valves
How do the diagnostics work?
- 1. Connecting the equipment. Connection to Tesla Toolbox 3.
- 2. System scan. Reading all active and stored fault codes from ECU memory.
- 3. Detailed analysis. Analysis of cell voltages, temperature readings and HV isolation.
- 4. Load testing. Running diagnostic tests and checking operation under load.
- 5. Report. For pre-purchase, before-the-warranty-expires and comprehensive diagnostics: a written report with recommendations and a preliminary quote for any repairs.
Tesla diagnostics prices
| Scope of work | Estimated price | Time | Booking |
|---|---|---|---|
| Basic diagnostics (fault code reading, general check) | 300 PLN | Time: 1-2 hours | |
| Pre-purchase diagnostics (with report and battery diagnostics) | from 650 PLN | Time: by arrangement | |
| Diagnostics before the warranty expires | from 650 PLN | Time: by arrangement | |
| Comprehensive diagnostics (all systems, battery analysis + road test) - free if we do the repair on the day of diagnostics | 700 PLN | Time: 4-6 hours |
Prices are estimates - we give the exact cost after diagnostics and always before any work begins.
Frequently asked questions
How much do Tesla diagnostics cost?
We offer four options: basic (fault code reading, general check) - 300 PLN, pre-purchase (with report and battery diagnostics) - from 650 PLN, before the warranty expires - from 650 PLN, comprehensive (all systems, battery analysis and a road test) - 700 PLN. Comprehensive diagnostics are free if we do the repair on the day of diagnostics.
How long do Tesla diagnostics take?
Basic diagnostics take 1-2 hours, comprehensive diagnostics 4-6 hours. The time for pre-purchase diagnostics and diagnostics before the warranty expires is set when you book - call +48 662 189 700 or leave your number in the form.
What is in the diagnostics report?
With pre-purchase, before-the-warranty-expires and comprehensive diagnostics you get a written report - as a PDF by email and on paper - with recommendations and a preliminary quote for any repairs. We do not issue a report with basic diagnostics (300 PLN); if you need a report, call us and we will advise the right option.
Do you use Toolbox 3 or a regular OBD scanner?
We connect the car to Tesla Toolbox 3 and read fault codes from all control units (ECU). We check the high-voltage system, the BMS (cell balancing, voltage and temperature sensors), the drivetrain (inverters, motors, gearboxes) and the cooling system.
Is it worth having a used Tesla diagnosed before buying it?
Pre-purchase diagnostics (from 650 PLN) include a report and battery diagnostics, so before signing you know the condition of the HV battery, the BMS and the other systems, and what repairs may be needed. Book a slot by phone (+48 662 189 700) or through the form. We carry out pre-purchase diagnostics at our workshop in Baranowo - book a slot and come in the car you want to buy.
How do diagnostics before the warranty expires differ from pre-purchase diagnostics?
Diagnostics before the warranty expires are for Tesla owners: we look for faults worth reporting to Tesla while the car is still under warranty - e.g. knocks in the suspension and control arms, drivetrain noise, how the air conditioning and heat pump work, door handles, seals and leaks, panel fit, paint, screens and electronics, faults stored in the control unit memory, and the battery condition. You get a report with a list of faults to report; Tesla decides whether a warranty repair is accepted. You can check when your car's warranty ends in the Tesla app.
Pre-purchase diagnostics are for buyers of a used Tesla: besides the technical condition and the battery, we check the car's history - whether it has been repainted, which parts have been replaced and whether there are signs of accident repairs - so that you know what you are buying before you sign the contract.
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.