how to fix my BMW X5 G05 (2019-2024) that overheats in traffic

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting any work.
• Disconnect the vehicle's battery to prevent electrical shorts.

2. Coolant Level Check

• Tools Required: Coolant funnel
• Inspect the coolant level in the reservoir.
• If low, add the appropriate coolant mixture (50% distilled water and 50% BMW-approved coolant).
• Start the engine and allow it to reach operating temperature, then recheck the coolant level.

3. Inspect and Replace Thermostat

• Tools Required: Socket set, torque wrench, gasket scraper
• Locate the thermostat housing and remove the bolts (typically 10-12 Nm).
• Remove the thermostat and inspect for proper function (should open when hot).
• Replace with a new thermostat if faulty.
• Clean the mating surfaces and install a new gasket.
• Torque the housing bolts to manufacturer specifications.

4. Radiator Inspection and Cleaning

• Tools Required: Hose, large bucket
• Inspect the radiator for external debris or blockages.
• If clogged, use a garden hose to flush the radiator from the backside to remove dirt and debris.
• Ensure that the radiator fins are straight and unobstructed.

5. Radiator Fan Operation Check

• Tools Required: Multimeter
• Start the engine and allow it to reach operating temperature.
• Use a multimeter to check the voltage at the radiator fan connector.
• If the fan does not engage, replace the fan motor or check the fan relay and wiring.

6. Hoses and Connections Inspection

• Tools Required: Pliers
• Inspect all hoses for cracks, bulges, or leaks.
• Replace any damaged hoses.
• Ensure all hose clamps are tight and in good condition.