FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
my BMW 5 Series G30/G31 (2017-2024) is leaking coolant, what are the common causes? - BMW 5 Series
Home/Cars/BMW/5 Series/G30/G31 (2017-2024)/my BMW 5 Series G30/G31 (2017-2024) is leaking coolant, what are the common causes?

my BMW 5 Series G30/G31 (2017-2024) is leaking coolant, what are the common causes?

BMW 5 Series G30/G31 (2017-2024)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
435 words

Problem Statement

The BMW 5 Series G30/G31 (2017-2024) is experiencing a coolant leak, which can lead to overheating and engine damage if not addressed promptly.

Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Allow the engine to cool completely before working on the cooling system.
  • •Disconnect the battery before performing any electrical work.

Symptoms

  • •Coolant puddles under the vehicle
  • •Low coolant warning light illuminated on the dashboard
  • •Engine overheating during operation
  • •Sweet smell of coolant inside or outside the vehicle
  • •Steam coming from the engine bay

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •Screwdriver set
  • •Coolant pressure tester
  • •Socket set
  • •Torque wrench
  • •Funnel

Parts Required

  • •Replacement hoses (if damaged)
  • •Water pump (if leaking)
  • •Radiator (if damaged)
  • •Coolant

Additional Information

Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
5 items
Parts Required
4 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation
Solution
1. Preparation
  • Gather all necessary tools and parts.
  • Ensure the engine is cool before starting work.
  • Disconnect the battery to prevent electrical issues.
2. Locate the Source of the Leak
  • Sub-steps:
    • Use a flashlight to inspect the areas identified during the diagnostic steps.
    • Mark the suspected leak location for reference.
3. Replace Damaged Components
  • Sub-steps:
    • If hoses are damaged, remove the clamps using a screwdriver and pull the hoses off.
    • Install new hoses by sliding them onto the fittings and securing with new clamps.
    • If the water pump is leaking, remove the drive belt by loosening the tensioner and taking off the belt.
    • Remove the water pump bolts and pull the pump off. Clean the mounting surface and install a new water pump with a new gasket.
    • If replacing the radiator, disconnect the hoses and remove the mounting bolts. Install the new radiator and reconnect hoses.
4. Refill Coolant System
  • Sub-steps:
    • Using a funnel, refill the coolant system with the appropriate type of coolant as specified in the owner's manual (usually BMW-approved coolant).
    • Start the engine and allow it to reach operating temperature while checking for leaks.
5. Final Checks
  • Sub-steps:
    • Ensure all clamps and bolts are tightened to the manufacturer's specifications.
    • Check the coolant level again and top off if necessary.

Tools Required:

  • Screwdriver set
  • Coolant pressure tester
  • Socket set
  • Torque wrench
  • Funnel

Parts Required:

  • Replacement hoses (if damaged)
  • Water pump (if leaking)
  • Radiator (if damaged)
  • Coolant

Estimated Repair Time: 2-4 hours

Safety Warnings:

  • Allow the engine to cool completely before working on the cooling system.
  • Disconnect the battery before performing any electrical work.