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NN4 Online
Free mainland UK delivery on orders of £40 or more
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Cooling and Heating

Finding parts that fit your vehicle.

Find Cooling and Heating for your vehicle

Enter your reg and we'll show you only parts that fit — no guesswork.

UK
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
Top brands in Cooling and Heating
Hella Apec Red Bosch NRF Gates

About Cooling and Heating

NN4 Online stocks a wide range of cooling and heating from established manufacturers including Hella, Apec Red, Bosch, NRF and Gates. Enter your registration above and we'll narrow the list to cooling and heating 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 cooling and heating 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 cooling and heating 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 cooling and heating. 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 Cooling and Heating

We stock cooling and heating from these manufacturers — each linked to a dedicated brand page with the full range:

Hella Hella Apec Red Apec Red Bosch Bosch NRF NRF Gates Gates

About Cooling and Heating

Our cooling and heating 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.

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