🔧 Parts Guide

Engine Parts
Complete Guide

Engine components keep your car running — from air and oil filtration to ignition and fuel delivery. Select any component below to learn what it does, what symptoms indicate failure and what it costs to replace.

Air Filter
The air filter prevents dust, dirt and debris from entering your engine.
£10-£30
Oil Filter
The oil filter removes contaminants from engine oil, protecting moving components from wear.
£5-£25
Fuel Filter
The fuel filter removes contaminants from fuel before it reaches the injectors and engine.
£15-£60
Spark Plugs
Spark plugs ignite the air-fuel mixture in petrol engines — essential for combustion.
£20-£80 (full set)
Ignition Coilpacks
Coilpacks generate the high-voltage spark needed to fire each cylinder in a petrol engine.
£30-£100 per coil
Timing Belt
The timing belt synchronises the crankshaft and camshaft — failure causes catastrophic engine damage.
£300-£700 including water pump and tensioners
Timing Chain
The timing chain performs the same function as a timing belt but is made from metal and theoretically lasts longer.
£500-£1,500
Engine Oil
Engine oil lubricates, cools and protects every moving component inside your engine.
£25-£80 for oil plus filter
Fuel Injectors
Fuel injectors deliver a precisely metered spray of fuel into the engine for combustion.
£150-£400 per injector
MAF Sensor (Mass Airflow Sensor)
The MAF sensor measures the volume of air entering the engine, allowing the ECU to calculate the correct fuel quantity.
£60-£180
Lambda Sensor (Oxygen Sensor)
The lambda sensor monitors exhaust gases to help the ECU maintain the correct air-fuel mixture.
£60-£180
Turbocharger
The turbocharger compresses intake air to increase engine power and efficiency.
£700-£1,800 supply and fit
EGR Valve
The EGR valve recirculates exhaust gases back into the intake to reduce NOx emissions.
£150-£500
Diesel Particulate Filter (DPF)
The DPF captures soot particles from diesel exhaust gases and periodically burns them off.
£800-£2,000 replacement / £150-£400 cleaning

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