The 2016 BMW 640i with a 6-cylinder engine is known to have issues with oil leaks, commonly from the valve cover gasket or oil filter housing gasket.

This model may experience problems with the high-pressure fuel pump, leading to rough idling, stalling, or difficulty starting the engine.

The Variable Valve Timing (VANOS) solenoids can fail, causing poor engine performance and triggering the check engine light.

There can be issues with the coolant system, such as leaks from the water pump or thermostat, leading to overheating.

The turbocharger in this model can suffer from wastegate rattle or failure, affecting engine performance and efficiency.

Direct injection engines, like the one in the 2016 BMW 640i, can experience carbon build-up on the intake valves, impacting engine performance and fuel efficiency.

The 2016 BMW 640i with a 6-cylinder engine is known to have issues with oil leaks, commonly from the valve cover gasket or oil filter housing gasket.

This model may experience problems with the high-pressure fuel pump, leading to rough idling, stalling, or difficulty starting the engine.

The Variable Valve Timing (VANOS) solenoids can fail, causing poor engine performance and triggering the check engine light.

There can be issues with the coolant system, such as leaks from the water pump or thermostat, leading to overheating.

The turbocharger in this model can suffer from wastegate rattle or failure, affecting engine performance and efficiency.

Direct injection engines, like the one in the 2016 BMW 640i, can experience carbon build-up on the intake valves, impacting engine performance and fuel efficiency.

The N63 engine in the BMW 640i is known to have issues with oil leaks from various gaskets and seals, which can lead to decreased engine performance and potential damage if not addressed.

The high-pressure fuel pumps in these engines can fail, leading to issues such as rough idling, stalling, and difficulty starting the vehicle.

This issue can cause the engine to burn oil, resulting in excessive oil consumption and smoke from the exhaust.

The timing chains in the N63 engine have been known to stretch or fail, which can cause severe engine damage if not replaced promptly.

The twin-turbo setup can experience failures, resulting in loss of power and increased exhaust smoke.

Components such as the water pump and thermostat may fail, leading to overheating and potential engine damage.

Parasitic drains in the electrical system can lead to battery issues, causing the vehicle to not start or to have electrical malfunctions.

Direct injection engines like the N63 can suffer from carbon build-up on intake valves, leading to reduced performance and fuel efficiency.

DBS might not activate during emergency braking situations, potentially leading to longer stopping distances.

Misfires can be caused by ignition coil or spark plug issues, leading to rough idling and poor acceleration.

Turbochargers in BMW 640i can sometimes fail, resulting in reduced power and increased exhaust smoke.

BMWs are known for cooling system issues, such as radiator, water pump, or thermostat failures, which can lead to engine overheating.

Common in BMW engines, oil leaks can occur from the valve cover gasket or oil filter housing gasket, leading to low oil levels and potential engine damage.

This can cause stalling, poor performance, and difficulty starting the engine.

Problems with the timing chain can lead to rattling noises and, if severe, can cause significant engine damage.

Issues such as rough shifting or transmission failure can occur, especially as the vehicle ages.

BMW 640i models may experience problems with electronic components, such as sensors, control modules, or wiring harnesses.

Direct injection engines like the one in the 640i can suffer from carbon buildup on intake valves, leading to performance issues and rough idling.

The 2015 BMW 640i, with its 6-cylinder engine, is known to develop oil leaks, often from the valve cover gasket or oil filter housing gasket. These leaks can lead to lower oil levels and potential engine damage if not addressed.

The high-pressure fuel pump in this model can fail, leading to issues such as rough idling, engine stalling, and reduced fuel efficiency.

The turbocharged engine may suffer from turbo lag, turbo failure, or wastegate issues, which can affect engine performance and lead to costly repairs.

The cooling system, including the water pump and thermostat, is known to have issues that can cause the engine to overheat, leading to potential engine damage.

Direct injection engines like the one in the 2015 BMW 640i can experience carbon build-up on the intake valves, which can cause rough idling, misfires, and reduced engine performance.

The electric water pump may fail prematurely, leading to overheating and potential engine damage if not replaced in a timely manner.

The timing chain and its associated components may wear out, leading to a rattling noise, engine misfires, and in severe cases, complete engine failure.

The N63 engine in the BMW 640i is known to have issues with oil leaks from various gaskets and seals, which can lead to decreased engine performance and potential damage if not addressed.

The high-pressure fuel pumps in these engines can fail, leading to issues such as rough idling, stalling, and difficulty starting the vehicle.

This issue can cause the engine to burn oil, resulting in excessive oil consumption and smoke from the exhaust.

The timing chains in the N63 engine have been known to stretch or fail, which can cause severe engine damage if not replaced promptly.

The twin-turbo setup can experience failures, resulting in loss of power and increased exhaust smoke.

Components such as the water pump and thermostat may fail, leading to overheating and potential engine damage.

Parasitic drains in the electrical system can lead to battery issues, causing the vehicle to not start or to have electrical malfunctions.

Direct injection engines like the N63 can suffer from carbon build-up on intake valves, leading to reduced performance and fuel efficiency.

DBS may fail to activate properly due to sensor or software issues, leading to ineffective emergency braking assistance.

Misfires in the 6-cylinder engine can be caused by faulty spark plugs, ignition coils, or fuel injectors, resulting in poor performance and fuel efficiency.

The 640i's turbocharged engine might suffer from turbo lag, boost leaks, or failure of the turbocharger itself, affecting overall power and acceleration.

The timing chain in the 2018 BMW 640i may stretch or fail, leading to poor engine performance, noise, or even catastrophic engine damage if not addressed.

Common in BMW engines, oil leaks may occur from the valve cover gasket, oil filter housing, or oil pan gasket, causing potential engine damage if oil levels drop too low.

Issues with the water pump, thermostat, or radiator can lead to overheating, which is detrimental to engine health and performance.

A failing high-pressure fuel pump can cause starting issues, engine stalling, or a loss of power under acceleration.

Modern BMWs are equipped with complex electronics that may fail, including sensors, control modules, and wiring harnesses, leading to various drivability issues or warning lights.

Direct injection engines, like in the 640i, are prone to carbon buildup on intake valves, which can lead to rough idling, poor acceleration, and reduced fuel efficiency.

The automatic transmission in the 640i may experience rough shifting, slipping, or failure, impacting drivability and performance.

Common in turbocharged engines like the one in the BMW 640i, often due to valve cover gasket or oil filter housing gasket failures.

The high-pressure fuel pump can fail, causing issues with starting and engine performance.

Turbochargers can wear out over time, leading to reduced performance and potential engine damage.

The cooling system can develop leaks, particularly in the water pump and thermostat, leading to overheating issues.

Direct fuel injection engines can suffer from carbon build-up on the intake valves, affecting performance and fuel efficiency.

The sophisticated electronics in the 640i can sometimes fail, causing various engine and performance problems.

The timing chain can stretch or fail, leading to misfires, poor performance, and potentially severe engine damage.