What does engine knocking mean?

Engine knocking can mean low oil level, worn crankshaft bearings, fuel detonation from low-octane gas, or a timing chain issue. If accompanied by an oil warning light or power loss, stop driving immediately and get it inspected.

How accurate is AI car noise diagnosis?

With an audio recording, MyAutoSound reaches approximately 93% accuracy on common mechanical issues. Text-only descriptions yield 75–80% accuracy. Both modes include a confidence indicator and alternative causes.

Is car noise diagnosis really free?

Yes. Basic diagnosis — likely cause, urgency level, and DIY checks — is completely free, no account required. PRO features like the mechanic PDF report and repair cost estimate cost 1 credit ($1 USD).

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Car making a weird noise?

Q: Why is my car making a grinding noise?

Grinding noises when braking usually indicate worn brake pads or damaged rotors. Grinding when turning can point to a worn CV joint or wheel bearing. MyAutoSound's AI analyzes the sound pattern, location, and when it occurs to pinpoint the most likely cause.

Describe the sound or record it live. Our AI identifies the likely cause in under 2 minutes — no appointment, no waiting room.

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Common car noises and what they mean

Car sounds are your vehicle's way of telling you something is wrong. Here are the most common ones.

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Grinding or squealing when braking

Likely causes: worn brake pads (wear indicator), glazed rotors, or a seized brake caliper.
Urgency: high — brakes are a safety-critical system.

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Clunking over bumps

Likely causes: worn sway bar end links, damaged ball joints, strut mounts, or loose exhaust heat shield.
Urgency: medium — can worsen handling if ignored.

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Engine knocking or ticking

Likely causes: low oil level, worn rod bearings, fuel detonation, or timing chain issues.
Urgency: very high — stop driving if oil light is on.

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Humming or rumbling at speed

Likely causes: worn wheel bearing (amplifies with speed), uneven tire wear, or differential issue.
Urgency: medium — a failing bearing can seize and lock the wheel.

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Hissing or whistling under the hood

Likely causes: coolant leak, cracked vacuum hose, blown head gasket, or serpentine belt wear.
Urgency: medium–high depending on whether temperature is rising.

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Rattling from underneath

Likely causes: loose exhaust heat shield, worn catalytic converter substrate, or loose underbody plastic panel.
Urgency: low–medium — usually not dangerous but can worsen.

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Why use MyAutoSound?

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Results in 2 minutes

No waiting room, no appointment. Get answers immediately.

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~93% accuracy with audio

Real AI acoustic analysis — not just keyword matching.

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Save $80–$150 in fees

Walk into the shop prepared. The mechanic PDF costs just $1.

Frequently asked questions

Why is my car making a grinding noise? ▾

Grinding when braking almost always points to worn brake pads — the metal wear indicator is contacting the rotor. Grinding when turning suggests a worn CV joint or wheel bearing. MyAutoSound pinpoints the exact location and likely cause based on your description.

Is it free to diagnose a car noise? ▾

Yes — the basic diagnosis (likely cause, urgency level, DIY checks) is completely free with no account required. The mechanic PDF report and detailed repair cost estimate cost 1 credit ($1 USD).

Do I need to record the sound? ▾

No — you can describe the noise in text and still get a detailed diagnosis. Recording gives the AI more data to work with (~93% vs ~75-80% accuracy), but both options produce a useful report.

What car brands does it work with? ▾

All of them — Toyota, Honda, Ford, Chevrolet, Hyundai, Kia, BMW, Mercedes, Volkswagen, Subaru, Nissan, and every other make. Gas, diesel, and hybrid vehicles are all supported.

Ready to find out what that noise is?

Free · No account · Results in 2 minutes

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