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

It’s usually normal for your check engine light to turn on upon ignition. It’s just your 840i firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my BMW 840i making engine noise?

Unusual noises can signal a problem with your BMW 840i engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my BMW 840i engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I use water in my BMW 840i radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with 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?

Your local Firestone Complete Auto Care has you covered with expert 840i engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Engine Repairs for Your 2020 BMW 840i

Learn about

2020 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.

L6/3.0L

2020 BMW 840i Repair

Nothing stays the same forever. Even your BMW 840i's many parts and pieces. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 2020 BMW 840i.

We’re Trained to Care for BMW 840i Engines

BMW 840i drivers trust that their 840i will take them near and far. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go sideways sometimes. When they do, you might find yourself searching for 2020 BMW 840i engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. 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 offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 2020 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 fuel injection, Potential causes may include a faulty oxygen sensor, worn spark plug, issues with your catalytic converter, or a leaking engine vacuum, to name a few potential sources. Bring your 840i in for an on-board diagnostic check and our expert techs will get the root of the problem. engine rattling, oil leaks, or a sinking feeling that something’s wrong.

BMW 840i Engine Repair

If your 2020 BMW 840i needs engine repair, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for 840i engine repairs and you can drive easy knowing that we use BMW-approved parts and fluids — timing chain or belt, motor oil seal, ignition coil, or other parts.

Questions About 2020 BMW 840i Engines

Why does my 840i’s check engine light come on when I start it? It’s usually normal for your check engine light to turn on upon ignition. It’s just your 840i firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my BMW 840i making engine noise? Unusual noises can signal a problem with your BMW 840i engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my BMW 840i engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I use water in my BMW 840i radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with 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? Your local Firestone Complete Auto Care has you covered with expert 840i engine repair. Schedule an appointment today and see us at one of our thousands of locations.