Hi,

Got my X5 in November 2025. The transmission light came on and it turns out there was hardly any fluid in the gearbox. I've since had a full gearbox service.

Unfortunately, the gearbox keeps losing fluid but there are no visible leaks. There are no leaks either on the ground where I park. The radiator fluid is full and so is the engine oil.

There are no other lights on the dash. The ignition light doesn't always come on either. The gears are worse when starting off. Once the car is running it changes gears ok.

If this is a serious problem, I would rather get rid of the car. I can't afford to be spending endless amounts of money trying to sort it out.

I will be going back to the garage again next week to get the transmission fluid topped up. It's roughly losing a litre of fluid then the ignition light comes on.

If anyone has any ideas, please help.

Thank you

Christine

Morning Christine

Get the garage to check the Transmission Cooler, transmission fluid can't just disappear but it may have leaked into the coolant, get them to test the Coolant for oil contamination in case the leak is into the engine coolant. The trans cooler is a Heat Exchanger that attaches to the rad by "O" ring seals it also has a Thermostat to help maintain correct Trans operating temperatures if the leak is at the rad end the fluid may have boiled off so the leak may not be obvious

Dave

Hi Dave,

I will definitely ask them to check that.

Watch this space 😄

Thank you 😊