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Diagnosis History

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FixMyCarSound FixMyCarSound
AI Diagnostic

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What is your car trying to tell you?

Record the sound and get a free AI diagnosis in about 60 seconds. Identifies 19 conditions — rod knock, brake wear, wheel bearings, and more.

1
Record
—
2
Describe
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3
Diagnose

A useful first step — not a final verdict. This tool identifies the most likely fault from audio alone so you walk into the shop knowing what to ask. A qualified mechanic with hands-on access to your vehicle has information we do not.

Hold your phone near the source of the sound

How It Works

Three steps from sound to diagnosis.

1

Record

Hold your phone near the noise and record up to 15 seconds of audio.

2

Describe

Tell us when it happens — idling, braking, turning, accelerating. Context improves accuracy.

3

Diagnose

Our AI returns the likely fault, a confidence score, and a repair cost estimate.

What We Detect

19 automotive conditions across engine, brakes, suspension, drivetrain, and exhaust.

Overall accuracy: 76% top-1 · 88% top-3 · Near-100% on high-confidence classes

Rod Knock Metal-on-Metal Grind Brake Wear Indicator Wheel Bearing Failure Power Steering Pump Bad Starter Engine Misfire Timing Chain Rattle Torque Converter Shudder Heat Shield Rattle Differential Gear Whine Valve Train / Lifter Noise Exhaust Leak Suspension Clunk Transmission Pump Whine Vacuum Leak Accessory Belt Turbo Whine No Fault Detected

Red = stop driving · Yellow = schedule repair · Green = no action needed

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What this tool cannot do

It cannot feel for play in a wheel bearing, smell a coolant leak, check compression, or read trouble codes. It cannot tell you whether the sound is coming from the left front versus the right rear, and it cannot inspect brake pad thickness, rotor condition, or CV boot integrity.

If the diagnosis points to rod knock, timing chain failure, or brake wear — do not keep driving to see if it gets worse. These are stop-driving conditions. Use this result to inform the conversation with your mechanic, not to replace it.

Browse Our Guides

Not sure what you are hearing? Start with a symptom guide or explore what our AI detects.

Car Sounds Guide

20 common car noises explained — grinding, knocking, squealing, rattling — with causes, urgency, and repair costs.

Browse by symptom →

AI Diagnostic Guide

All 19 conditions our AI detects — with accuracy notes, how the AI identifies each fault, and what to do next.

Browse by condition →

Common Questions

How accurate is the AI diagnosis?
Overall top-1 accuracy is 76% and top-3 accuracy is 88% across all 19 categories. Twelve conditions — including rod knock, brake wear indicator, and wheel bearing failure — achieve near-100% accuracy. A handful of acoustically ambiguous conditions like vacuum leaks have lower detection rates, which are documented on each condition's guide page.
Do I need to create an account?
No account required. Record, describe, and get your diagnosis — the tool works entirely in the browser. Your recording is only used for this diagnosis and is not stored permanently.
What if my result seems wrong?
Check the top-3 alternatives in your result — the correct fault is often listed there even if it is not the primary diagnosis. Try recording closer to the sound source in quieter conditions. Background noise and distance significantly affect accuracy.

See all frequently asked questions →