MajorCommonTransmission

Nissan Micra: K12 CVT Judder and Belt Slip (Hyper-CVT)

K12 CVT Judder and Belt Slip (Hyper-CVT) is a common transmission fault on the Nissan Micra on the 2003–2010 cars, and we rate it major. Putting it right costs $2,000 to $5,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 22 documented faults on the Nissan Micra.

Vehicle: Nissan Micra
Years: 2003–2010
Fuel: petrol
Gearbox: cvt
System: Transmission

This page covers the Nissan Micra as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Nissan Micra faults22 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The K12 Micra with automatic transmission uses Nissan's Hyper-CVT unit. Fluid degradation causes shudder under acceleration between 15 and 50 km/h. The unit is sensitive to the correct NS1 or NS2 fluid and fails early when serviced with generic ATF. Repairs in NZ are complicated by limited parts availability for this small CVT, often meaning unit replacement. Well-documented in UK Micra forums and confirmed by NZ independent workshops.

What you would notice

Shudder or judder felt through vehicle from 20–50 km/h under light throttle
Transmission slow to engage from rest
Slipping or hunting under uphill acceleration
Whining noise increasing with road speed

How to check it

Where to look. CVT gearbox attached to engine, front of vehicle under bonnet

Test drive on flat road at light throttle between 20–50 km/h and feel for judder through seat and steering.
Check CVT fluid condition at service port.
Confirm fluid type used — NS1/NS2 only, not generic ATF.
Ask about full transmission service history.

What it costs to put right

$2,000 to $5,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the CVT fluid been changed using genuine Nissan NS1 or NS2 fluid?”
“Has the transmission ever shuddered or hesitated under normal driving?”
“Has the car been to a Nissan dealer or specialist for any transmission work?”

Now check the Nissan Micra you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Nissan Micra buyer questions

Is k12 cvt judder and belt slip (hyper-cvt) serious on a Nissan Micra?

We rate it major and common on the Nissan Micra. The K12 Micra with automatic transmission uses Nissan's Hyper-CVT unit. Fluid degradation causes shudder under acceleration between 15 and 50 km/h. The unit is sensitive to the correct NS1 or NS2 fluid and fails early when serviced with generic ATF. Repairs in NZ are complicated by limited parts availability for this small CVT, often meaning unit replacement. Well-documented in UK Micra forums and confirmed by NZ independent workshops.

How much does it cost to fix on a Nissan Micra?

$2,000 to $5,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Nissan Micra years are affected?

Our research records this fault on the 2003–2010 Nissan Micra. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Test drive on flat road at light throttle between 20–50 km/h and feel for judder through seat and steering. Check CVT fluid condition at service port. Confirm fluid type used — NS1/NS2 only, not generic ATF. Ask about full transmission service history. Look here: CVT gearbox attached to engine, front of vehicle under bonnet