Why does my 645Ci’s check engine light come on when I start it?

It’s usually normal for your check engine light to turn on upon ignition. This is just your 645Ci testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are BMW 645Ci engine noises bad?

Strange under-the-hood noises can point to problems within your BMW 645Ci engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my BMW 645Ci engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Is it okay to put water in my BMW 645Ci radiator?

It’s not recommended you put water in your 645Ci radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

Why did my 645Ci engine suddenly stop?

There are different reasons your 645Ci vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who repairs BMW 645Ci engines?

For BMW 645Ci engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Engine Repairs for Your 2005 BMW 645Ci

Learn about

2005 BMW 645Ci Trim Options

Select your BMW 645Ci trim level to learn more about BMW-recommended engine repair. Even BMW 645Ci parts will get older and change.

V8/4.4L

2005 BMW 645Ci Repair

Nothing lasts forever. Even your BMW 645Ci’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 2005 BMW 645Ci services.

We Care for BMW 645Ci Engines

The BMW 645Ci is respected for its reliability. You may have even been thinking about that when you bought it. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If they do, you’ll have to find a dependable 2005 BMW service center — quick! That's when it's time to head to Firestone Complete Auto Care. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your BMW 645Ci engine will be in good hands. Schedule an appointment if you're experiencing problems that could require engine repair. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Illuminated Check Engine Light on 2005 BMW 645Ci

If your 645Ci check engine light is on, it’s time to get it looked at. A check engine light that’s flashing or steadily illuminated could point to problems with your vehicle's ignition, Causes may include a faulty oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leaking engine vacuum, to name a few possible causes. Stop by your local Firestone Complete Auto Care to get your 645Ci issues diagnosed and we'll determine exactly why your check engine light is on. Other signs it's time for BMW 645Ci engine service might include burning smells, or a sinking feeling that something’s wrong.

Engine Repairs for Your 2005 645Ci

If your 2005 BMW 645Ci needs engine repair, our technicians will make sure you understand what’s going on before they start working on your engine. We make recommendations, but you make the final decision. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We want to give you all the details you need to make an informed decision about your engine repairs. Choose Firestone Complete Auto Care for BMW 645Ci engine repairs and you can feel good knowing that we only use BMW-compliant replacement parts such as the serpentine belt, motor oil seal, sensors, or other parts.

Questions About 2005 BMW 645Ci Engines

Why does my 645Ci’s check engine light come on when I start it? It’s usually normal for your check engine light to turn on upon ignition. This is just your 645Ci testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are BMW 645Ci engine noises bad? Strange under-the-hood noises can point to problems within your BMW 645Ci engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my BMW 645Ci engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Is it okay to put water in my BMW 645Ci radiator? It’s not recommended you put water in your 645Ci radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
Why did my 645Ci engine suddenly stop? There are different reasons your 645Ci vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who repairs BMW 645Ci engines? For BMW 645Ci engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.