my BMW 5 Series F10/F11 (2010-2017) coolant warning light is on, what does that mean?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool to avoid burns and ensure safety.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Coolant

• Tools Required: Socket set, funnel, drain pan
• Drain the old coolant:
  1. Locate the drain plug on the radiator.
  2. Place a drain pan underneath and remove the drain plug to allow coolant to flow out.
• Flush the cooling system:
  1. Close the drain plug and fill the system with clean water.
  2. Start the engine and let it run for a few minutes, then turn it off and allow it to cool.
  3. Drain the water again to remove any debris.
• Add new coolant:
  1. Use a 50/50 mixture of BMW-approved coolant and distilled water.
  2. Fill the coolant reservoir to the recommended level.

3. Inspect and Replace Damaged Components

• Tools Required: Screwdriver set, pliers
• Check for damaged hoses:
  1. Inspect all hoses for cracks, bulging, or leaks.
  2. Replace any damaged hoses with OEM parts.
• Check the water pump:
  1. Inspect for leaks around the water pump shaft.
  2. Replace the water pump if any leaks are found.

4. Inspect and Replace the Thermostat

• Tools Required: Socket set, gasket scraper
• Remove the thermostat:
  1. Locate the thermostat housing.
  2. Remove the housing bolts and carefully take out the thermostat.
• Install a new thermostat:
  1. Clean the mating surfaces of the housing and engine block.
  2. Position the new thermostat and reattach the housing.