Why does the check engine light come on when I start my 525i?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 525i testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are BMW 525i engine noises bad?

Unusual noises can signal a problem with your BMW 525i engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my BMW 525i engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I add water to my BMW 525i radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your 525i when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What could cause my 525i engine to suddenly stop?

If your 525i 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 525i engines?

Your local Firestone Complete Auto Care offers BMW 525i engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

1990 BMW 525i Engine Repair

Learn about

1990 BMW 525i Trim Options

Select your BMW 525i trim level to learn more about BMW-recommended engine repair. Use the following chart to find information.

L6/2.5L

Repairs for Your 1990 BMW 525i

Nothing stays the same forever. Even your BMW 525i’s engine parts and components will change. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 1990 BMW 525i services.

We Know BMW 525i Engines

The BMW 525i is respected for its reliability. You probably thought about that when you got it. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If the unexpected strikes, you may search the internet frantically for quick and affordable 1990 BMW 525i engine repairs. That’s where Firestone Complete Auto Care comes in. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your BMW 525i 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.

Illuminated Check Engine Light on 1990 BMW 525i

As soon as your 525i 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. Possible causes can include a failing oxygen sensor, worn spark plug, issues with your catalytic converter, or an engine vacuum leak, but that's only a few of the possible causes. Bring your 525i in for an on-board diagnostic check and our expert techs will get the root of the problem. Other signs your BMW 525i engine needs some TLC are essential fluid leaks, or misfiring.

Engine Repairs for Your 1990 525i

If your 1990 525i 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 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. Choose Firestone Complete Auto Care for BMW 525i engine repairs and you can drive easy knowing that we use BMW-approved parts and fluids — serpentine belt, valve guide seal, sensors, or another part.

1990 BMW 525i Engine Q&A

Why does the check engine light come on when I start my 525i? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 525i testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are BMW 525i engine noises bad? Unusual noises can signal a problem with your BMW 525i engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my BMW 525i engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I add water to my BMW 525i radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your 525i when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What could cause my 525i engine to suddenly stop? If your 525i 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 525i engines? Your local Firestone Complete Auto Care offers BMW 525i engine repair. Schedule an appointment today at one of our thousands of locations nationwide!