Why does my 735iL’s check engine light come on when I start it?

Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your 735iL firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my BMW 735iL making engine noise?

Strange under-the-hood noises can point to problems within your BMW 735iL engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 a BMW engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your BMW 735iL 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. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my BMW 735iL radiator?

While it’s not recommended, you can use water in your 735iL 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.

What could cause my 735iL engine to suddenly stop?

There are different reasons your 735iL 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 fixes BMW 735iL engines?

Your local Firestone Complete Auto Care fixes BMW 735iL engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 1991 BMW 735iL Engines

Learn about

1991 BMW 735iL Trim Options

Select your BMW 735iL trim level to learn more about BMW-recommended engine repair. Even BMW 735iL parts will get older and change.

L6/3.5L

BMW 735iL Repairs and Services

Nothing stays the same forever. Even your BMW 735iL's many parts and pieces. We’re here to help when something stops working. Click on a repair below to learn more about 1991 BMW 735iL repairs.

We’re Trained to Care for BMW 735iL Engines

BMW 735iL engines are known for their reliability. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. When they do, you might find yourself searching for 1991 BMW 735iL engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service BMW 735iL engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

My 1991 BMW 735iL Check Engine Light Is On

If your 735iL check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your car’s ignition, Possible causes can include a failing oxygen sensor, worn 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 735iL issues diagnosed and we’ll figure out why that check engine light is giving you grief. Other signs your BMW 735iL engine needs some TLC are essential fluid leaks, or misfiring.

1991 735iL Engine Services

If your 1991 735iL engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We seek to give you all the info you need to make a smart decision about our services. Turn to Firestone Complete Auto Care for your 1991 735iL engine repairs and you can feel good knowing that we only use BMW-compliant replacement parts such as the timing chain or belt, valve guide seal, fuses, or other parts.

Questions About 1991 BMW 735iL Engines

Why does my 735iL’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your 735iL firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my BMW 735iL making engine noise? Strange under-the-hood noises can point to problems within your BMW 735iL engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 a BMW engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your BMW 735iL 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. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my BMW 735iL radiator? While it’s not recommended, you can use water in your 735iL 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.
What could cause my 735iL engine to suddenly stop? There are different reasons your 735iL 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 fixes BMW 735iL engines? Your local Firestone Complete Auto Care fixes BMW 735iL engines. Book an appointment today! We have thousands of locations across the country.