
Renault Koleos transmission fluid should be changed every 60,000 kilometers. Signs that indicate the need for a transmission fluid change include: vehicle shaking, gear shifting hesitation; transmission overheating warning on the dashboard; car stalling; and unusual noises. Different vehicle models have different change intervals. Below are the change intervals for transmission fluid: Manual transmission: Manual transmission fluid is generally recommended to be changed every three years or approximately 100,000 kilometers. Automatic transmission: Automatic transmission fluid is generally recommended to be changed every two years or approximately 40,000 kilometers. Continuously Variable Transmission (CVT): CVT fluid is generally recommended to be changed every two years or approximately 60,000 kilometers. The methods for changing the transmission fluid in a Renault Koleos are as follows: Unscrew the drain plug at the bottom of the transmission to drain the old fluid before refilling. Remove the transmission oil pan directly to drain and refill the fluid: This method is more thorough than the previous one, as it removes impurities from the bottom of the oil pan. Use a circulating machine to change the automatic transmission fluid: A smart circulating machine can dynamically change the fluid and filter out sludge and impurities from the automatic transmission through a cleaning cycle.

I've driven a Renault Koleos for six years and changed the transmission fluid twice. The first time was at 40,000 kilometers as per the manual, but later the mechanic suggested that automatic transmissions are best serviced every 60,000 kilometers. Especially in summer with high temperatures and frequent city traffic jams, the transmission fluid gets hot and oxidizes easily, so it's advisable not to exceed 80,000 kilometers. Last time I changed it at 70,000 kilometers, and when the oil pan was opened, it was all black with the filter clogged. After the change, the shift from 1st to 2nd gear felt much smoother, and pressing the accelerator wasn't as strenuous. Remember to use the original manufacturer's fluid; don't cheap out with substitutes. Also, have the mechanic check the transmission seals—if they're worn out, they can leak oil.

With over a decade of car repair experience, I recommend changing the automatic transmission fluid for the Renault Koleos every 60,000 to 80,000 kilometers. I've encountered several owners who went 100,000 kilometers without a change, and the sludge buildup clogged the solenoid valves, resulting in major repairs costing thousands. Vehicles frequently driven on mountain roads or carrying heavy loads should change the fluid more often. I once saw a Koleos used at construction sites with black, metal-flecked fluid at just 50,000 kilometers. Use a flush machine for a complete fluid change—gravity draining only replaces half. Genuine NS-3 specification fluid is the most reliable; aftermarket fluids with incorrect viscosity can damage the transmission. For regular maintenance, avoid prolonged short-distance driving, as the transmission fluid won't reach optimal temperature, leading to faster carbon buildup.

My Renault Koleos just passed its warranty period when I had the transmission fluid changed. The 4S shop quoted an exorbitant price, so I had it done at a friend's garage instead. The mechanic said Renault transmissions are quite delicate and require fluid changes every five years or 60,000 km without fail. Checking the maintenance manual confirmed this, though the manual's data is based on ideal road conditions. In northern winters, gearshift hesitation during cold starts should serve as a warning sign. I bought genuine fluid online for just over 300 yuan, with labor bringing the total to 700 yuan. I also had the fuel system cleaned while at it. Post-change, acceleration feels noticeably sharper, and fuel consumption dropped by 0.5 L/100km. Don't delay this service—degraded fluid causes gear wear that's far costlier to fix.


