Parts Guides

How the air filter affects fuel economy, mass-airflow sensor health and engine wear — plus the brands that actually fit first time.

Engine oil, brake fluid, coolant, ATF, power steering fluid. Why viscosity is only half the answer, and why OE approvals matter more than the price.

Catalytic converters, DPFs, silencers, wing mirrors, body panels, trim. Type approval law, exhaust failure modes, mirror options and what UK rust does to body panels.

Alternators, starters, batteries, bulbs, headlamp assemblies, sensors. How to diagnose electrical faults methodically and choose replacements that fit and last.

Radiators, water pumps, thermostats, expansion tanks and the heater matrix. How to diagnose overheating, what to replace and which brands actually fit first time.

Clutches, dual-mass flywheels, CV joints, drive shafts, gearbox mounts. What fails, when, and how to choose between OE, mid-market and budget when the bill matters.

Oil filter, cabin filter, air filter, fuel filter, spark plugs and glow plugs — the consumables that protect every other expensive part. What to buy and what to skip.

Wishbones, ball joints, shock absorbers, anti-roll bar links — what wears, how to spot it, and what to fit. The single largest parts category on UK cars.

Timing systems, gaskets, valves, oil pumps — the engine internals that take cars off the road. Failure modes by engine family, replacement strategy, and how to pick parts that last.