Is it the battery? What to do first
Note how it fails
Slow cranking on cold mornings, a click and nothing, or a battery message on the dash. AA New Zealand treats slow cranking from a battery past its third birthday as a warning sign.
Think about how the car is used
The manual says the battery may need charging if the car does frequent short trips or is often parked for more than a month. A car that lives that way can flatten a healthy battery.
Get it tested
Ask the mechanic to test the battery and the charging system before replacing anything. A flat battery and a worn-out one aren't the same job.
Fit and register
If it does need replacing, the new one should be a battery approved for your MINI, of the right type, and registered on the car.
Why registration matters on a MINI
The car keeps track of the battery that's fitted. Registering a new one, as the manual puts it, makes sure all the convenience functions are fully available, and clears the related warning messages.
So the mechanic needs a scan tool that talks to MINIs, whether they come to you or you go to them. Ask on the phone whether they'll register the battery as part of the job.
How long a battery lasts depends on how the car is used. In New Zealand conditions, AA New Zealand expects 3 to 5 years from one that's kept charged and fitted correctly.
What a MINI Cooper service involves
MINIs use Condition Based Service. Sensors and software in the car work out how hard it's being driven and when each item falls due, so the dash, not a fixed date, tells you what's next.
From 1 November 2022, MINI New Zealand put new cars on a five-year or 100,000 km warranty, electric and plug-in hybrid models included, and its three-year MINI Service Inclusive plan carried on unchanged.
Outside the plan, an independent garage can service a MINI. The MTA says that should be low risk for the warranty when the work follows the maker's guidelines and specifications.
A MINI that came in from Japan
A great many used cars here arrived from Japan, and Japanese-market cars come in a wider spread of specifications than those sold new locally. If your MINI came in that way, give the mechanic the VIN, so the battery and parts are matched to the exact car rather than to the badge.
Your side, and the mechanic's
You can
- Note when the battery was last replaced, if you know.
- If the car mostly potters around town, give it a longer drive every so often.
- Photograph any battery or service message on the dash.
Leave to the mechanic
- Testing the battery and the charging system.
- Fitting an approved battery and registering it to the car.
- Resetting service items after a Condition Based Service visit.
Our take on a MINI battery
We'd have the battery and the charging tested before buying anything, because a car that sits a lot can flatten a perfectly good battery. If it does need replacing, we'd ask for an approved battery of the right type, registered to the car, and a note on the invoice saying it was done.