
The Cummins 3003814 is a genuine NTA855 Oil Cooler. G Service Power has this unit brand new and boxed, in stock in the UK at £750, ready for next-day worldwide dispatch. Call +44 7951 632187.

Actual unit photographs. Further photos and video on request.
| Part number (MPN) | 3003814 |
|---|---|
| Manufacturer | Cummins |
| Product | NTA855 Oil Cooler |
| Alternate part number | 6003814 |
| Casting stamp | 3003814 A SEP 23 2009 (cast into the housing) |
| Component | Engine oil cooler assembly |
| Engine model | Cummins NTA855 / NT855 |
| Application | Trucks, generator sets, construction plant and marine |
| Condition | New — never installed, stored; no damage or corrosion |
| Country of origin | United States |
| Location | UK — ready to ship worldwide |
| Condition | Brand New |
| Availability | In stock — next-day worldwide dispatch |
| Price | £750 ex works UK, excl. VAT |
| Reference | GX-3003814 |
The Cummins NTA855 Oil Cooler — part number 3003814 is a genuine Cummins part, supplied at £750 by G Service Power. It is brand new, held in UK stock and dispatched next day, worldwide. Fits Trucks, generator sets, construction plant and marine.
Cummins engine oil cooler assembly for the NTA855 diesel engine, part number 3003814, also referenced as 6003814 — the casting on this unit is stamped 3003814 A SEP 23 2009 (see photos). The oil cooler is the shell-and-tube heat exchanger that passes engine oil across engine coolant to hold oil temperature in check under sustained load, protecting oil film strength and bearing life, so it is a routine replacement on rebuilds and a sensible spare for anyone running NT855-family engines. Condition: brand new, never installed, stored — heavy-duty cast housing with clean internal passages, all threads and ports undamaged and no corrosion. Fits Cummins NTA855 and NT855 engines across truck, generator-set, construction and marine applications. Price £750 plus VAT. Heavy item — posted at extra cost. Please verify compatibility against your engine serial number before ordering. In UK stock — call +44 7951 632187 or message on WhatsApp for shipping and availability.
Compatibility: confirm against your existing part number and application before ordering — call +44 7951 632187 and we will check it with you.
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