Why does my 840i’s check engine light come on when I start it?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 840i testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Are BMW 840i engine noises bad?

Unusual noises can signal a problem with your BMW 840i engine. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my BMW 840i engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Is it okay to put water in my BMW 840i radiator?

While it’s not recommended, you can use water in your 840i radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

Why did my 840i engine suddenly stop?

If your 840i car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who fixes BMW 840i engines?

For BMW 840i 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 2023 BMW 840i

Learn about

2023 BMW 840i Trim Options

Select your BMW 840i trim level to learn more about BMW-recommended engine repair. Use the following chart to find information.

BMW 840i Repairs and Services

Nothing lasts forever. Even your BMW 840i's many parts and pieces. When something breaks, we're ready. Select a repair or category to learn more about 2023 BMW 840i services.

We Care for BMW 840i Engines

BMW 840i engines are known for their reliability. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 2023 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 840i engine will be in good hands. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 2023 BMW 840i

As soon as your 840i check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission system, and it won’t go away by ignoring it. Causes may include a faulty oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few possible causes. Stop by your local Firestone Complete Auto Care to get your 840i issues diagnosed and our expert techs will get the root of the problem. rattling sounds, essential fluid leaks, or a sinking feeling that something’s wrong.

2023 840i Engine Services

When your BMW 840i engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We don't start working until we have your approval. If a repair can wait, we'll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We seek to give you all the info you need to make a smart decision about our services. Choose Firestone Complete Auto Care for BMW 840i engine repairs and you can feel confident knowing that we use BMW-approved parts and components like the timing belt, valve guide seal, fuses, or another part.

Questions About 2023 BMW 840i Engines

Why does my 840i’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 840i testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Are BMW 840i engine noises bad? Unusual noises can signal a problem with your BMW 840i engine. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my BMW 840i engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Is it okay to put water in my BMW 840i radiator? While it’s not recommended, you can use water in your 840i radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
Why did my 840i engine suddenly stop? If your 840i car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who fixes BMW 840i engines? For BMW 840i 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.