Engine Parts - Engine Internals
Find Engine Parts - Engine Internals for your vehicle
Enter your reg and we'll show you only parts that fit — no guesswork.
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- ✓ Free delivery on orders over £40
- ✓ UK stock, dispatched from Northampton
- ✓ Filtered to your specific vehicle from DVLA data
Browse all Engine Parts - Engine Internals
- FAI Engine Intake Valve 35mm Head IV95200 £12.99
- FAI Piston Cylinder Bore = PK25-000 £93.99
- FAI Crankshaft Shaft Seal OD ID Wide OS2215 £10.99
- FAI Crankshaft Shaft Seal OD ID Wide OS1009A £63.99
- FAI Engine Oil Pump Assembly OP345 £160.99
- FAI Engine Intake Valve 29mm Head IV181018 £13.99
- FAI Engine Oil Pump Assembly OP333 £62.99
- FAI Crankshaft Shaft Seal 37mm OD ID Wide OS1269 £9.99
- FAI Cylinder Head Gasket Kit HS720NH £36.99
- FAI Crankshaft Damper Kit 162mm FVD1011K £55.99
- FAI Cylinder Head Gasket Kit HS1230 £80.99
- FAI Cylinder Head Gasket Kit HS1693 £66.99
- Febi Intake Manifold Fitting 5 Connectors Plastic 176636 £334.99
- Febi Intake Manifold Fitting Connectors Aluminium 176617 £259.99
- FAI Cylinder Head Gasket Kit HS2288NH £82.99
- FAI Crankshaft Damper 153. FVD1187K £309.99
- FAI Engine Intake Valve 30mm Head IV95062 £16.99
- FAI Intake Manifold Gasket Set ID Wide High IM880 £12.99
- FAI Crankshaft Damper Kit 153mm FVD1038K £52.99
- FAI Cylinder Head Gasket 0mm Thick HG1618A £17.99
- FAI Crankshaft Damper 166.5mm FVD1157K £289.99
- FAI Cylinder Head Gasket Thick HG2201 £43.99
- FAI Crankshaft Damper Kit 152mm FVD1023K £85.99
- FAI Crankshaft Damper Kit 136mm FVD1041K £46.99
About Engine Parts - Engine Internals
NN4 Online stocks a wide range of engine parts - engine internals from established manufacturers including Apec Red, Bosch, NRF, MANN-FILTER and Mahle. Enter your registration above and we'll narrow the list to engine parts - engine internals that match your vehicle in the TecDoc catalogue. We always recommend confirming the part dimensions against your existing component before fitting, as specifications can vary between trim levels and engine variants.
All stock dispatches from our Northampton warehouse with free standard delivery on orders over £40 to most UK mainland locations. Browse the full engine parts - engine internals catalogue below, or use the registration lookup to filter to parts matched to your vehicle.
Frequently asked
How do I know a part will fit my car?
Enter your registration above and we cross-check against the TecDoc catalogue to narrow the list to engine parts - engine internals listed against your vehicle. Specifications can still vary between trim levels and engine variants, so we recommend confirming the part dimensions against your existing component before fitting.
What brands do you stock?
We stock established manufacturer brands sourced through trade channels. The brand row at the bottom of this page shows which manufacturers we carry for engine parts - engine internals. We don't sell unbranded parts.
How quickly will my order arrive?
Most orders dispatch from our Northampton warehouse within 1–2 working days. Free standard delivery on orders over £40 to most UK mainland locations.
What if the part doesn't fit?
Please check our returns policy for the current terms. If you're unsure about fitment for your specific vehicle variant, please contact our team before ordering using the details at the bottom of the site.
Can I check fitment before ordering?
Yes — every product page shows whether the part is listed against your selected vehicle. Where multiple sizes exist for the same vehicle, the dimensions are shown so you can compare against your existing part. If you're unsure, contact our team for help confirming the right option.
Brands for Engine Parts - Engine Internals
We stock engine parts - engine internals from these manufacturers — each linked to a dedicated brand page with the full range:
About Engine Parts - Engine Internals
Our engine parts - engine internals range is built from established UK suppliers and trusted aftermarket brands. Each product is mapped against OE/OEM references and TecDoc ktype data so the reg-lookup above filters to only the parts that fit your specific make, model, engine and trim.
Enter your registration to see exact-fit options — or browse by brand using the tiles above. The full catalogue covers most major makes and models on UK roads, with same-business-day dispatch on stock items ordered before 2pm.
Engine and cooling system parts
Engine and cooling parts span a wide spectrum — timing belts and chains, water pumps, alternators, starters, gaskets and seals. Some are service-interval items (timing belt every 5-10 years or 60-100k miles depending on engine), others are catch-it-early items where small failures can lead to bigger ones if ignored.
Common engine warning signs
- Whining or rattling from the front of the engine — failing belt tensioner or alternator bearing.
- Coolant loss with no visible leak — head gasket, hose or water pump seal.
- Charging warning light or dim headlights at idle — alternator output dropping.
- Slow cranking on cold mornings — starter motor or battery, both worth checking.
Don't postpone a timing-belt service
The biggest avoidable engine failure on the UK fleet is timing-belt overrun. If your service book is missing or the previous owner's record is unclear, get it checked — replacing a belt costs a few hundred pounds; replacing the engine after a belt snap on an interference engine runs into thousands.
Why buy from NN4 Online
- Reg-lookup fitment — see only the parts mapped to your specific vehicle.
- UK warehouses — most stock items dispatch same business day on orders before 2pm.
- Established brands — the brand tiles above are the full list available in this category.
- Standard returns — handled per our returns policy linked in the footer.