BMW E39 M5: The Perfect Blend of Luxury, Power, and Timeless Appeal

The BMW E39 M5, while revered for its performance and luxury, has several common issues that owners and potential buyers should be aware of. These problems are often related to the car's age and high-performance nature. Here are some of the most common issues:

1. Rod Bearing Wear

• Premature Wear: The S62 V8 engine is known to have issues with rod bearing wear, which can lead to serious engine damage if not addressed. Regular oil changes with high-quality oil are crucial to mitigate this risk.

2. VANOS System Issues

• VANOS Rattle: The variable valve timing system (VANOS) can develop a rattle, especially at lower RPMs, due to worn seals and other internal components.

• VANOS Seal Failure: Over time, the seals in the VANOS system can degrade, leading to poor performance and increased engine noise.

3. Cooling System Problems

• Radiator Leaks: The radiator, particularly the plastic components, can become brittle and develop leaks over time.

• Water Pump Failure: The water pump is prone to failure, which can cause overheating if not replaced in a timely manner.

• Thermostat Issues: The thermostat can fail, either getting stuck open or closed, affecting the engine's ability to maintain optimal temperature.

4. Timing Chain Guides

• Plastic Guides: The timing chain guides, made of plastic, can become brittle and break over time, leading to timing chain issues and potentially severe engine damage.

5. Throttle Body Actuators

• Actuator Failure: The electronic throttle body actuators can fail, causing issues with throttle response and engine performance. This problem can trigger the "Check Engine" light and result in limp mode.

6. Suspension Component Wear

• Control Arm Bushings: The front control arm bushings are prone to wear, leading to vague steering and uneven tire wear.

• Thrust Arm Bushings: Thrust arm bushings can also wear out, causing a shimmy or vibration under braking.

7. Rust Issues

• Body and Undercarriage: Rust can develop in various areas, including the wheel arches, rocker panels, and undercarriage, particularly in regions with harsh winters or salty roads.

8. Oil Leaks

• Valve Cover Gaskets: The valve cover gaskets are prone to leaking, especially as the engine ages, leading to oil seepage around the engine.

• Timing Chain Tensioner Gasket: This gasket can also leak, contributing to oil loss.

9. Clutch Wear

• Premature Wear: The clutch is known to wear out relatively quickly, particularly if the car has been driven hard or used frequently in stop-and-go traffic.

10. Differential Issues

• Differential Leaks: The rear differential can develop leaks, particularly around the seals, which can lead to whining noises and eventual differential failure if not addressed.

11. Electrical Problems

• Dead Pixels in Instrument Cluster: The digital display in the instrument cluster can suffer from dead pixels, making it difficult to read important information.

• Navigation and Audio System Failures: The factory navigation and audio systems can fail, particularly due to issues with the aging electronics.

12. Fuel Pump Failure

• Premature Failure: The fuel pump is known to fail prematurely, leading to starting issues or engine stalling.

Preventative Maintenance is Key

Despite these common issues, many of them can be managed with regular maintenance and proactive care. Enthusiasts often upgrade problem areas with more durable parts to ensure their E39 M5 remains reliable and performs at its best.