BMW's Australian high-voltage battery warranty runs 8 years or 160,000 km for battery-electric models first registered on or after 1 November 2022, and subsequent owners are also entitled to all benefits.
On capacity, BMW's supplementary warranty document commits only to protection against "excessive capacity loss." The phrase is not defined anywhere in the document. There is no percentage, no threshold, and no stated method for determining when loss becomes excessive.
Plug-in hybrids get considerably less: 6 years or 100,000 km, on the same undefined capacity language.
The terms
| Applies to | First registered | Years | Kilometres | Capacity guarantee | Transfers |
|---|---|---|---|---|---|
| BEV — i4, i5, i7, iX, iX1, iX2, iX3 | On or after 1 Nov 2022 | 8 | 160,000 km | None published — "excessive capacity loss", undefined | Yes |
| Plug-in hybrids | On or after 1 Nov 2022 | 6 | 100,000 km | None published | Yes |
Why an undefined threshold is a weaker position than it sounds
When a manufacturer publishes 70%, a claim is a factual question: test the battery, compare to the number. When the standard is "excessive," the manufacturer decides, case by case, what excessive means — and you are arguing rather than demonstrating.
That does not make BMW's cover worthless. It does mean that if you ever need to use it, dated, certified evidence of the pack's condition will matter more than it would with a brand that publishes a number. You are building a case rather than pointing at a threshold.
The PHEV gap is the bigger story
A BMW plug-in hybrid — an X5 xDrive50e, a 530e — gets 6 years and 100,000 km, which is two years and 60,000 km less than the electric cars. Plug-in hybrid packs are smaller, work harder per kWh, and cycle more often relative to their capacity. Shorter cover on a harder-worked pack is worth factoring into what you pay.
What to check on a used BMW
- Whether the car was first registered on or after 1 November 2022, which determines whether these terms apply at all
- Whether it is a BEV or a PHEV, because the terms differ substantially
- The tested State of Health, which here is not just useful information — it is the evidence base for any future claim
Terms verified 13 September 2026 from BMW Australia's supplementary warranty document, November 2022 edition, the current version linked from BMW Australia's own service portal. Manufacturer terms change, and the terms that apply to any given car are those in force when it was first sold. Always confirm with the manufacturer for the specific vehicle.