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The Complete MOT Checklist 2025 – How to Pass Your Isleworth MOT

Getting ready for an MOT Test in London can be stressful — missed checks, unexpected failures, and wasted time. With this 2025 London-specific checklist, you’ll know exactly what to inspect before your test, boost your chances of passing first time, and avoid costly re-tests or failures.

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Engine, Emissions & Diagnostic Checks

Modern MOT tests include emission checks and engine diagnostics: • Make sure engine warning light (MIL) is off. • Replace clogged air filter, old spark plugs, or worn sensors. • Warm engine before the test — colder engines may read higher emissions. • Ensure exhaust system is intact, secure, and not leaking. • Use a diagnostic scan to detect hidden fault codes that might cause failure.

Battery, Fluids & Under-Bonnet Inspections

A well-maintained engine bay helps you pass without surprises: • Check oil, coolant, brake fluid, power steering fluid (if applicable). • Look for leaks, loose hoses, cracked pipes. • Inspect battery terminals — clean and tight. • Check the bonnet latch, engine mounts, visible belts & pulleys for wear.