Engine Management Sensors
Find Engine Management Sensors for your vehicle
Enter your reg and we'll show you only parts that fit — no guesswork.
Don't know your reg? Find manually
- ✓ Free delivery on orders over £40
- ✓ UK stock, dispatched from Northampton
- ✓ Filtered to your specific vehicle from DVLA data
Browse all Engine Management Sensors
- BM Catalysts Pressure Pipe PP11046A PP11046A £47.99
- BM Catalysts Pressure Pipe PP11044A A6394900137 PP11044A £31.99
- BM Catalysts Pressure Pipe PP11037A 1714H2 PP11037A £47.99
- BM Catalysts Pressure Pipe PP11033B PP11033B £43.99
- BM Catalysts Pressure Pipe PP11033A PP11033A £48.99
- BM Catalysts Pressure Pipe PP11033C PP11033C £71.99
- BM Catalysts Pressure Pipe PP11029B 2E0131582C PP11029B £31.99
- BM Catalysts Pressure Pipe PP11026B 1714J8 PP11026B £44.99
- BM Catalysts Pressure Pipe PP11029A 2E0131581F PP11029A £44.99
- BM Catalysts Pressure Pipe PP11025B 2573426040 PP11025B £45.99
- BM Catalysts Pressure Pipe PP11028A 55355409 PP11028A £46.99
- BM Catalysts Pressure Pipe PP11026A 1714J7 PP11026A £43.99
- BM Catalysts Pressure Pipe PP11025A 2573326011 PP11025A £48.99
- BM Catalysts Pressure Pipe PP11027A PP11027A £33.99
- BM Catalysts Pressure Pipe PP11024B 30731189 PP11024B £48.99
- BM Catalysts Pressure Pipe PP11024A 30731188 PP11024A £45.99
- BM Catalysts Pressure Pipe PP11022C 8200372219 PP11022C £79.99
- BM Catalysts Pressure Pipe PP11022B PP11022B £47.99
- BM Catalysts Pressure Pipe PP11022A PP11022A £47.99
- BM Catalysts Pressure Pipe PP11016B A9064900337 PP11016B £34.99
- BM Catalysts Pressure Pipe PP11021A 1618G9 PP11021A £51.99
- BM Catalysts Pressure Pipe PP11016A A9064900237 PP11016A £31.99
- BM Catalysts Pressure Pipe PP11014C 8200391217 PP11014C £77.99
- BM Catalysts Pressure Pipe PP11013B 1714G2 PP11013B £26.99
About Engine Management Sensors
NN4 Online stocks a wide range of engine management sensors from established manufacturers including Hella and Bosch. Enter your registration above and we'll narrow the list to engine management sensors 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 management sensors 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 management sensors 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 management sensors. 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.
About Engine Management Sensors
Our engine management sensors 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.