MajorCommonTransmission

Renault Koleos: Jatco CVT Fluid Degradation and Belt Judder

Jatco CVT Fluid Degradation and Belt Judder is a common transmission fault on the Renault Koleos on the 2008–2019 cars, and we rate it major. Putting it right costs $3,500 to $9,000 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 17 documented faults on the Renault Koleos.

Vehicle: Renault Koleos
Years: 2008–2019
Fuel: petrol
Gearbox: cvt
System: Transmission

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

All Renault Koleos faults17 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Radiator yet. We would rather show none than show a picture of a different part.

What goes wrong

Koleos CVT models use a Jatco unit with a cooling circuit integrated into the engine radiator. Degraded CVT fluid — from extended service intervals or a cooling system fault — causes belt-to-pulley judder on gentle acceleration and, in advanced cases, slipping under load. Once judder is present, a fluid change may temporarily improve symptoms but full CVT replacement is usually needed. This pattern is documented across all Nissan/Renault Jatco CVT applications in NZ and AU.

What you would notice

Shuddering or vibration during gentle acceleration from a standstill
Slipping sensation under load at highway speeds
Transmission warning light illuminated
Whining or drone from transmission under acceleration

How to check it

Where to look. Underfloor centre tunnel, behind engine

Test drive with smooth, gentle acceleration from rest — feel for any shudder or vibration between 10–30 km/h.
Check CVT fluid condition: should be clear red, not brown or burnt-smelling.
Request CVT fluid service history.

Parts involved: Radiator.

What it costs to put right

$3,500 to $9,000 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

“When was the CVT fluid last changed?”
“Has the transmission ever shuddered or vibrated on acceleration?”
“Has the transmission been inspected, repaired, or replaced?”

Now check the Renault Koleos 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.

Renault Koleos buyer questions

Is jatco cvt fluid degradation and belt judder serious on a Renault Koleos?

We rate it major and common on the Renault Koleos. Koleos CVT models use a Jatco unit with a cooling circuit integrated into the engine radiator. Degraded CVT fluid — from extended service intervals or a cooling system fault — causes belt-to-pulley judder on gentle acceleration and, in advanced cases, slipping under load. Once judder is present, a fluid change may temporarily improve symptoms but full CVT replacement is usually needed. This pattern is documented across all Nissan/Renault Jatco CVT applications in NZ and AU.

How much does it cost to fix on a Renault Koleos?

$3,500 to $9,000 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 Renault Koleos years are affected?

Our research records this fault on the 2008–2019 Renault Koleos. 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 with smooth, gentle acceleration from rest — feel for any shudder or vibration between 10–30 km/h. Check CVT fluid condition: should be clear red, not brown or burnt-smelling. Request CVT fluid service history. Look here: Underfloor centre tunnel, behind engine