Why does the check engine light come on when I start my 90?

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

Why is my Audi 90 making engine noise?

Strange engine sounds can be a sign something’s off in your Audi 90. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage a Audi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Audi 90 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Is it okay to put water in my Audi 90 radiator?

It’s not recommended you put water in your 90 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 90 engine suddenly stop?

If your 90 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Where can I go for Audi 90 repair?

Your local Firestone Complete Auto Care has you covered with expert 90 engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Engine Repairs for Your 1991 Audi 90

Learn about

1991 Audi 90 Trim Options

Select your Audi 90 trim level to learn more about Audi-recommended engine repair. Even Audi 90 parts will get older and change.

L5/2.3L

Audi 90 Repairs and Services

Nothing lasts forever. Even your Audi 90’s engine parts and components will change. When something breaks, we're ready. Click on a repair below to learn more about 1991 Audi 90 repairs.

We Care for Audi 90 Engines

Audi 90 engines are known for their reliability. You probably thought about that when you got it. 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 Audi 90 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. We've serviced more than 500 million vehicles since 1926, and our technicians know Audi 90 engines. Schedule a courtesy inspection at the first sign of engine trouble. 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 1991 Audi 90

As soon as your 90 check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your car’s ignition, Possible causes can include a failing oxygen sensor, bad spark plug, issues 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 90 issues diagnosed and our expert techs will get the root of the problem. rattling sounds, burning smells, or engine misfiring.

Audi 90 Engine Repair

If your 1991 90 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. If it's necessary for your safety, we'll make sure you understand that, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for 90 engine repairs and you can feel confident knowing that we use Audi-approved parts and components like the timing belt, motor oil seal, sensors, or a different component.

Engine Q&A 1991 Audi 90

Why does the check engine light come on when I start my 90? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Audi 90 making engine noise? Strange engine sounds can be a sign something’s off in your Audi 90. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage a Audi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Audi 90 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Is it okay to put water in my Audi 90 radiator? It’s not recommended you put water in your 90 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 90 engine suddenly stop? If your 90 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Where can I go for Audi 90 repair? Your local Firestone Complete Auto Care has you covered with expert 90 engine repair. Schedule an appointment today and see us at one of our thousands of locations.