Carautonomy — car parts and warning lights explained

Cars explained in plain English.

Helping drivers understand how their car works - so they can walk into the garage informed, not intimidated.

How can we help you today?

Four ways in — depending on your needs.

Pick the one that sounds like you— each opens a different way to find what you need
Triage

Something's wrong

“My car's doing something odd — what should I do?”
Pick what you're noticing. We'll point at the likely culprits.
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Featured explainer

Ignition System

Creates the spark that fires the engine (petrol only).

Read the full explainer →
BatteryECUCoilPlugPower → timing → high voltage → spark
UK
MOT
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No jargon

Everything is written like a friend explaining it over a cup of tea — no acronyms left undefined.

UK-focused

Rough fitted prices in pounds, MOT-relevant warnings, and advice that matches British roads.

Informed, not sold to

We're not here to flog parts. Just to help you understand before you spend a penny.