Diagnosis by symptom

It knocks, squeaks, hums or smokes — but you do not know what the part is called. Pick what you hear or see: we explain the likely causes, how to check it yourself, and show the parts we have in stock.

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Brakes 6 symptoms

Squeak or Squeal When Braking 12 → Vibration in the steering wheel or pedal when braking 12 → Spongy or Soft Brake Pedal 12 → Car pulls to one side when braking 12 → The Brake System Light is On 12 → Handbrake not holding the car 12 →

Suspension and steering 8 symptoms

Knock in the suspension on bumps 12 → Knock or crunch when turning the wheel 12 → The car pulls to one side on a flat road 12 → Uneven tyre wear 12 → The Car Rocks After Hitting a Pothole 12 → The steering has become heavy 12 → Wheel Hum, Increasing with Speed 12 → Play in the steering wheel 12 →

Engine 11 symptoms

Engine Misfires and Shakes at Idle 12 → Check Engine Light On 12 → Engine Won't Start 12 → Black Smoke from Exhaust 12 → Blue or grey smoke from the exhaust 12 → White smoke from the exhaust 12 → Squealing Belt When Cold 12 → Knocking in the Engine When Accelerating 12 → Jerking and stuttering when accelerating 12 → Increased Fuel Consumption 12 → Oil Leak Under the Engine 12 →

Transmission and clutch 5 symptoms

Clutch is slipping, revs are increasing without acceleration 12 → Clutch Pedal Creaks or Has Become Heavy 12 → Grinding when changing gears 12 → Clicking or popping when turning under load 12 → Jerking and jolting in an automatic gearbox 12 →

Cooling 4 symptoms

Engine Overheating 12 → Engine takes a long time to warm up, cold heater 12 → Coolant is disappearing without visible leaks 12 → Groaning or Roaring Noise from Under the Hood When Warm 12 →

Electrical 4 symptoms

Car Battery Drains Overnight 12 → The Battery Light is On While Driving 12 → Headlight or dipped beam not working 12 → Power windows or central locking not working 12 →

Exhaust 3 symptoms

A loud exhaust noise, like a roaring sound from underneath 12 → Exhaust fumes smell in the cabin 12 → Rattling from below on uneven roads 12 →

Climate and cabin 4 symptoms

Air Conditioning Not Cooling 12 → Unpleasant smell from air vents 12 → The windows are steaming up from the inside 12 → Wipers Leave Streaks 12 →

This material is for reference only and does not replace a hands-on inspection. The final verdict on the fault and on whether the car is safe to drive is made by a mechanic after diagnosing the vehicle.