What Causes BMW Drivetrain Malfunctioning & Car Won’t Start?
Owning a BMW is a symbol of luxury and performance, but even the best vehicles can experience issues from time to time. We got you if you’ve ever found yourself with a BMW that won’t start due to a drivetrain malfunction. But why won’t the BMW drivetrain malfunction?
So, the drivetrain malfunction detects an error in your engine or transmission. This error indicates that something is not functioning correctly within the drivetrain system. The ECU will automatically regulate the engine’s performance when a drivetrain malfunction is detected to protect your engine.
To give you a better insight, we’ll explore the common causes of drivetrain malfunctions in BMWs.We have also shared some tips to prevent them in the near future.
What Could Cause a BMW Drivetrain Malfunction That Prevents the Car From Starting?
The drivetrain is the link between the engine and the wheels. With a malfunctioning drivetrain, It can not transmit power to the engine and move the car.
Let’s see the drivetrain malfunction causes that prevent a BMW car from starting:
You May Have a Faulty or Worn out Spark Plug
In BMWs, faulty or worn-out spark plugs can cause drivetrain errors and other issues. But how do you know if you have a faulty spark plug? Well, the answer is a misfire.
Misfires occur when the engine does not ignite the fuel properly, causing it to run poorly or stall. This can result in a rough or erratic idle and may cause the car to shake or vibrate while driving.
It is important to replace spark plugs regularly, as they tend to wear out after about 30,000 miles.
Read Also: Why BMW Won’t Start With Push Button? Causes & Quick Fixes
There Can Be A Failure in Ignition Coil
Ignition coils play a critical role in a car’s ignition system. They are responsible for providing the spark that ignites the fuel in the engine.
In BMWs, ignition coil failure can cause drivetrain malfunction errors and various other problems.
If you suspect your BMW has a faulty ignition coil, there are a few ways to test it. One option is to swap the ignition coil with another cylinder and see if the misfires follow.
If the misfires move to the cylinder with the swapped ignition coil, the ignition coil is likely the cause of the problem.
There Can be a Faulty Fuel Pump
A faulty fuel pump can be a severe problem for BMW owners, as it can prevent the engine from getting the fuel it needs to run smoothly.
One of the most common fuel pump problem symptoms is difficulty in accelerating. Rapid acceleration can cause the fuel pump to struggle to keep up with the engine’s demand.
This can lead to a lack of power and trigger the check engine light and drivetrain malfunction error on the dashboard.
If you are experiencing issues with your BMW’s fuel pump, replace it as soon as possible.
Read Also: Why BMW Won’t Start After Changing the Dead Battery?(Fixed)
You May Have a Clogged Catalytic Converter
Being a vital part of the exhaust system, the catalytic converter reduces harmful gasses and improves the car’s overall emissions.
Over time, it is common for particles to become stuck in the catalytic converter, resulting in a blockage. Old BMW”s cars with high mileage are more prone to this problem.
When the catalytic converter becomes clogged, it can obstruct the flow of exhaust fumes and cause problems with the engine and drivetrain.
If you suspect a clogged catalytic converter is a culprit, there are a few solutions, like replacing it or getting a new one. But the best is to visit a professional mechanic.
Damaged Fuel injectors
Fuel Injectors can be damaged for various reasons, including clogging, corrosion, or misalignment. Thus it can cause a malfunction in the BMW drivetrain that can cause starting problems in the car.
If your injectors are damaged, take them to a car mechanic for better inspection.
Read Also: Why Does the BMW Key Won’t Open the Door? [Mysteries Solved]
Tips For Preventing Drivetrain Malfunction On BMW cars
Preventing drivetrain malfunctions on BMW cars ensures that your car runs smoothly and reliably. Following regular maintenance and care, you can extend the car’s lasting time and prevent costly repairs.
Keep Up With Routine Maintenance
Regular maintenance, such as oil changes, spark plug replacements, and tune-ups, can help with BMW’s drivetrain. This way, you can ensure that other components are in good working order.
Check and Replace Worn or Damaged Parts
If you notice any wear or damage on your BMW, don’t hesitate to replace them as soon as possible. Neglecting to do so can lead to more severe problems down the line.
When replacing parts on your BMW, don’t compromise the quality. Buy high-quality OEM (original equipment manufacturer) parts as they are compatible with your car and will function properly.
Avoid Overloading the Car
Do not overload your car, as it can strain your BMW’s drivetrain. The same rule applies to heavy towing.
Abusive driving habits, such as sudden acceleration, hard braking, and excessive speeding, can incite drivetrain malfunction.
Thus driving cautiously and responsibly, you can prevent drivetrain malfunction.
Frequently Asked Question
BMW owners often have these common questions regarding drivetrain malfunction. We have given our best to fulfill their query.
Is It Safe To Drive A BMW With A Drivetrain Malfunction?
It is not safe to drive a BMW with a drivetrain malfunction. If you are experiencing any malfunction, we suggest you stop in a safe place and inspect the issue first.
Will BMW Warranty Cover Drivetrain Malfunction Repairing Cost?
The drivetrain of a BMW is protected under the Powertrain Warranty for a period of four years or 50,000 miles, whichever comes first. This coverage applies to issues or defects related to the drivetrain and can help protect owners from expensive repairs.
Can A Drivetrain Malfunction Cause Damage To Other Parts Of My BMW?
If you ignore the drivetrain malfunction for a long period, it can cause damage to other parts of your BMW.
Can I Repair A Drivetrain Malfunction On My Own?
In most cases, a qualified mechanic should check the drivetrain malfunction as it can be a complex issue requiring specialized knowledge and equipment. However, in some cases, the owner can perform minor repairs or maintenance.
So, now you know why the BMW drivetrain malfunctioning car won’t start. We recommend driving your BMW with moderation speed, especially in situations where the engine is working harder.
Also, don’t go for cheap, substandard aftermarket parts, as they need frequent replacement. Investing in high-quality OEM parts may be more cost-effective in the long run as they are long-lasting.
It is important to properly assess your mechanical skills and knowledge before attempting any repairs on your BMW. So it is always best to consult a professional mechanic for guidance.