Battery
16 article(s) on «Battery». Sorted by severity — most severe first.
Model 3/Y 82 kWh Panasonic (US): frequent module imbalance
American 2021–2022 LR cars show frequent imbalances; treated by replacing modules/the pack. An alternative — replacement with LG 79 kWh.
Model S 85 kWh and pre-facelift X: stuck air valves and moisture ingress into the battery
Old Model S 85-kWh packs (and same-design 90-kWh packs in pre-facelift S/X) are prone to corrosion/leaks through valves/fuse cover → BMS errors, HV shutdown. What to look for and how to fix it.
Which battery does my Tesla have? NCA, NMC, LFP, 4680 lookup by model and year (2026)
Quick lookup table for every Tesla battery chemistry by model and year: NCA 18650 (early S/X), NCA 21700 (US M3/Y), NMC LG 79 kWh, LFP — prismatic CATL/BYD (CN/EU SR), 4680 Texas Model Y. How to check what you have via VIN and Service Mode, reliability ranking from community experience, and which packs are risky to buy used.
Used Tesla buying checklist: what to verify in 10 minutes by model and battery (2026)
Structured checklist: what to do BEFORE the viewing, the 3 software checks that take 10 minutes (ScanMyTesla, ECUVIN, our cert-risk calculator), how to inspect body / suspension / electronics in person, and the red flags for each battery chemistry (NCA/LFP/NMC/4680). Distilled from 400,000+ messages in our community.
Battery Test — battery calibration via Service Mode
Battery Test is the BMS calibration procedure. Where and how to run it in Belarus, what charger you need, how long to wait.
Model 3/Y 79 kWh LG (Europe, NOT China): a reliable choice
LG 79 kWh (EU) shows the lowest failure rate per field reports. A good balance of longevity and charge.
Model 3/Y: HV battery module-level repair — who can do it in Belarus and what it costs
82 kWh Panasonic packs degrade in a typical pattern — one out of 16 modules weakens → imbalance → errors. Good news: a module can be replaced individually. What it costs in Belarus, who actually can do it, and when it's easier to take a refurb pack.
Tesla Model 3/Y LFP 60–64 kWh (CATL/BYD): durably reliable, but RWD only
LFP batteries (CATL/BYD) — an excellent choice for long-term ownership: low degradation with daily 80–100% charging and simple operation. Usually fitted to RWD.
Tesla Model Y (TX, 4680): battery issues and zero repairability
Some Model Ys with the new 4680 batteries (USA, Gigafactory Texas) have shown traits that complicate battery service and repair: the structural battery pack is harder to repair, and mass production of the 4680 is facing difficulties.
Tesla Model S/X 100 kWh Plaid/Palladium: features and vulnerabilities
The ~100 kWh Palladium pack on Tesla Model S/X Plaid and Long Range (2021+ refresh): 7920 Panasonic 18650 cells, more reliable voltage sensing, but the floor is vulnerable to impacts and moisture.
Model S/X 100 kWh: voltage sense harness tab failures
On 100-kWh batteries, voltage sense harness/tab failures on modules occur → BMS errors, pack shutdown. What to do and how much it costs in Belarus.
Model S/X 90 kWh: faster degradation than 85
90-kWh packs (NCA with silicon added to the anode) per owner reports degrade faster than 85. Fewer typical 'fatal' defects.
Tesla Model S/X stuck HV contactor: BMS_f038 errors, won't sleep, won't charge — diagnosis and replacement
Sticking HV battery contactors on early 85/90 kWh packs cause BMS_f038 / BMS_f087 errors, prevent the car from sleeping (12V drains overnight), and after a charge-station pyrofuse trigger leave the car unable to drive or charge. Service Mode diagnostics, replacement procedure, and why this is one of the few HV jobs you should not DIY.
Model S/X refresh (2021+): battery sealing issues (officially acknowledged by Tesla)
Tesla has officially acknowledged a battery sealing issue: bulletin SB-25-16-002 'Replace Flood Port Plungers' (05.05.2025) — free goodwill replacement of 5 flood ports on S/X built 01.2021–22.09.2022 (US and Europe). Caveat: the bulletin covers external flooding; there are still no confirmed 'breathing' moisture-ingress cases on Palladium packs.
Model 3/Y 54 and 75 kWh (pre-facelift, before 2021): imbalance happens, but less often
The 54/75 kWh packs (pre-facelift) are generally more stable than 82 kWh, but imbalance is possible. What to look at when buying and servicing.
Tesla diagnostic software: Scan My Tesla, OBD adapter & what it shows (2026)
Scan My Tesla is the go-to Tesla diagnostic app over OBD: real battery SOH, cell imbalance, temperatures, charge power. Which adapter you need for Model 3/Y and S/X, what it costs, what to check when buying used, and the alternatives (Service Mode, TM-Spy, Aviloo).