“Lifetime battery warranty” has become a headline selling point for several brands in Thailand, and a great deal of inaccurate information has come with it — some of it inflating expectations, some of it wrongly convincing people the cover is worthless.
This piece works from the official terms and conditions, not from advertising or hearsay.
MG Lifetime Warranty: the official terms
Covers three components (only)
- High-voltage battery assembly
- Electric Drive Unit (EDU) — the drive motor
- Power Electric Box (PEB) — the motor control unit
Note what isn’t there: the 12V battery. That is the most frequently failing component in any EV, and it is always the owner’s cost.
Eligible models (eight)
MG Urban, MG4 Electric, MG S5, MG IM5, MG IM6, MG MAXUS 7, MG MAXUS 9 and MG Cyberster — registered as personal vehicles only.
The most widely misunderstood point: is it transferable?
| What you often hear | The official terms |
|---|---|
| ”First owner only — it dies when you sell” | No. Cover remains in effect through multiple ownership changes, provided the car stays in personal use |
| ”There’s a mileage cap” | The document specifies no mileage limit |
| ”You need SOH below 70% to claim” | MG’s document states no SOH threshold at all |
This matters directly to resale value. If you believe the cover dies on sale, you may price your car too low — or overlook a used car that still carries it.
Duration
Runs from the date the authorised dealer issues the invoice to the first customer, and continues until the vehicle is no longer operational or is deregistered with the Department of Land Transport.
⚠️ The condition that actually voids it
The customer must complete every scheduled maintenance visit at an authorised MG service centre throughout the coverage period, or coverage ends automatically.
In practice this is what costs people their cover — not the exotic exclusions everyone worries about, but something as ordinary as missing a service or turning up late for one.
Other exclusions
- Commercial or rental use
- Accident damage (requires inspection by an authorised service centre)
- Modifications or non-standard repairs
- Disasters, theft and misuse
BYD: current promotion status
BYD in Thailand previously offered existing customers lifetime battery cover for ฿5,000.
Current status: that promotion closed on 31 December 2025. If you find an article or post still urging you to register, it is out of date.
Customers who registered in time hold cover on the agreed terms. Everyone else falls under BYD’s standard battery warranty as written in each car’s warranty booklet.
Other brands: standard warranties
| Brand | Standard terms |
|---|---|
| Tesla | 8 years, with a mileage cap that varies by model (base Model 3 at 160,000 km; Long Range and Performance at 192,000 km), and a minimum 70% capacity retention |
| Volvo | 8 years / 160,000 km — check the capacity criterion in your own car’s warranty booklet |
| BYD, MG and most Chinese brands | 8 years or more depending on model, with capacity terms stated in the warranty booklet |
A caution about the SOH figure: the widely quoted 70% comes mainly from Tesla. Not every brand uses the same number, and some — including MG in its lifetime warranty document — publish no figure at all. Check your own warranty booklet rather than a number circulating online.
The most important lesson: a warranty is worth the network that honours it
NETA is the clearest example the Thai market has produced.
Many NETA owners hold an 8-year battery warranty. But when the parent company entered reorganisation, service centres closed and some parts ran to ten-month waits — an unexpired warranty document does not guarantee that anyone is available to do the work.
So the question to ask before buying isn’t only “how many years?” but:
- What is the local distributor’s financial position? The obligation sits with a legal entity, not a badge
- How many service points can work on high-voltage batteries in the south, not nationwide
- Is there a parts warehouse in Thailand, or is everything ordered case by case?
- How large is the installed base? More cars on the road means more independent workshops and a real parts market over the long run
Checklist: protecting your cover
Before buying
- Ask for the full terms document, not an advertisement or a photo sent on chat
- Read the exclusions section first — that section determines what the cover is actually worth
- Confirm your specific model is on the eligible list, since campaigns rarely cover every model
- Ask about transfer on resale, and get the answer in writing
- Ask what each scheduled service costs — servicing is a condition, not an option
While you own the car (the most important part)
- Never miss a scheduled service, and never turn up late. Set reminders well in advance
- Keep every service invoice, on paper and photographed on your phone
- Don’t modify the electrical system, particularly accessories that draw from the high-voltage system
- Take software updates through official channels only
- Log SOH readings periodically so you have history if you ever need to claim
When claiming
- Submit the complete document set at once so the process doesn’t drag
- Ask for inspection results in writing, not over the phone
- If refused, ask for the reason in writing with the contractual clause cited
- Appeal internally first, with your complete service history attached
- If unresolved, contact the Office of the Consumer Protection Board on 1166 or the Thailand Consumers Council on 1502
So is a lifetime warranty worth it?
More than most people assume, once you know that MG’s actual terms transfer to later owners and carry no mileage cap. That turns it into something that adds resale value rather than a right that evaporates on sale.
But there is a hidden cost to weigh: you are committing to dealer servicing for the life of the vehicle, and one miss ends the cover immediately. So work out whether the cumulative servicing cost across 8-10 years justifies the protection, and whether the service centre is realistically close enough. For people in Phuket, the drive to a service centre is a genuine factor.
What no warranty covers, so budget for it:
- The 12V battery — replaced every 18-24 months in Phuket, at ฿2,500-6,500 a time
- Tyres, brake pads, cabin filters and general consumables
- Accident and flood damage — that’s motor insurance, not a manufacturer warranty
EV Phuket — The Work That Sits Outside Every Warranty
- 12V battery replacement for all EV brands, with system reset (the component no lifetime campaign covers)
- Free 12V health check — voltage, CCA and load test
- Post-flood inspection before you plug in
- 24-hour emergency jump start (cars only — we don’t service motorcycles)
- 20-30 minute arrival anywhere in Phuket
Call 098-168-9907
Related Reading
- Thailand’s EV Battery Standard - what regulation actually requires
- The NETA Collapse - warranties without a network
- BYD’s 115,000-Car Recall - what it actually was
- EVs and Floodwater - why this is insurance, not warranty
Sources: MG Lifetime Warranty terms (mgcars.com), Tesla and Volvo battery warranty terms, BYD Thailand promotion announcements, Office of the Consumer Protection Board (ocpb.go.th), Thailand Consumers Council (tcc.or.th) — verified July 2026.