CAT 1665002 PLUG for C18 Caterpillar Part - WSTPARTS
Need a dependable Electrical System part for your Caterpillar C18 and C15 machine? The 1665002 PLUG from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Electrical System. Every unit is fitment-verified before dispatch. Manual reference: C15: ELECTRICAL AND STARTING SYSTEM, group 349-5036, page 280; C18: BASIC ENGINE, group 245-4466, page 137.
1665002 PLUG for Caterpillar C18 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement PLUG (Part # 1665002). Designed for CAT C18, C15 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C18, C15
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 1665002 |
| Product Name | PLUG |
| Brand | CAT |
| Applicable Models | C18, C15 |
| Weight | 0.09 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1665002 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| C15 | ELECTRICAL AND STARTING SYSTEM | 349-5036 | p.280 |
| C18 | BASIC ENGINE | 245-4466 | p.137 |
| C18 | BASIC ENGINE | 245-4467 | p.138 |
| C15 | LUBRICATION SYSTEM | 264-0258 | p.163 |
| C18 | COOLING SYSTEM | 243-2641 | p.198 |
| C18 | COOLING SYSTEM | 245-4465 | p.199 |
System Notes — ELECTRICAL AND STARTING SYSTEM
The electrical and starting system covers the battery, starter motor, alternator, wiring harness, relays, switches and the instrument panel. It carries current from the batteries to the starter to crank the engine, and from the alternator back to keep the batteries charged. Because these machines work in dust, vibration and wide temperature swings, connectors corrode, harness insulation chafes against the frame, and starter solenoids burn out from repeated short cranks. Parts in this group are usually replaced on a symptom basis — slow cranking, a dash warning, lights that dim under load, or a no-start condition traced to an open circuit.
System Notes — BASIC ENGINE
The basic engine group covers the core structure and internals: cylinder block, cylinder head, pistons, rings, liners, connecting rods, crankshaft, bearings, camshaft and the gasket sets that seal them. These parts determine compression, oil pressure and power output. They wear gradually — rings lose tension, bearings show copper, liners glaze — and the first signs are usually blow-by from the breather, rising oil consumption, or a knock that gets louder as the engine warms. Replacing a basic engine part is a planned overhaul decision rather than a roadside fix, so matching the exact part number and serial number range matters more here than anywhere else on the machine.
FAQ
Is 1665002 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT C18.
Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
