Direct fit 522-1644 5221644 engine speed sensor replacement for Caterpillar. Features robust fiberglass-sleeved wire leads and 1-inch hex head design. Tracks crankshaft position for CAT 3508, 3512, and 3516 marine, industrial, and generator systems. 1-Year replacement warranty layer.
DATA SPECIFICATION SHEET: ENGINE SPEED GP-SENSOR MODULE
Component IdentityEngine Speed / Timing Proximity Sensor (SENSOR GP-SPEED)
OEM Part Number522-1644 / 5221644
Sensing ArchitectureFerrous / Magnetic Proximity Pulse Array
Harness Extension335 mm (13.2 Inches) Integrated Cable Length
Conductor InsulationHigh-Heat Fiberglass Protective Sleeving with Melt Heat Shrink Tubing
Mechanical Mount Drive25.4 mm (1 Inch) Hex Size Interface
Targeted ApplicationsInjection Control, Timing Synchronization, and Emissions Management
Warranty Protection12 Months Structural Repair or Module Swap Services

Diagnostic Guide (Common Failure Symptoms)

When an emissions-control engine speed sensor fails or suffers thermal degradation, engine synchronization can falter. Mechanics typically document hard cranking, intermittent power loss spikes, flashing check engine diagnostic fault flags, incorrect timing logs, or unexpected generator set trip disruptions due to unstable engine frequency data loops.

Heavy Equipment Fitment Matrix

• CAT Heavy Propulsion Systems: 3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B, 3516C Marine Engines
• Auxiliary Power Systems: 3508B, 3508C, 3512B, 3512C, 3516B, 3516C Auxiliary Systems
• Prime Power Generation Fleets: 3508B, 3512B, 3516B, 3516C Standby Power Sets
• Petroleum & Industrial Systems: 3512B, 3516B, 3516C, LD700E Industrial Units | 3508B, 3508C, 3512C, 3516B, 3516C Petroleum Engines
• Mobile Petroleum Grid Sets: 3512B, 3512C Infrastructure Power Generators
• Off-Highway Earthmoving: 3508B Mining Haul Trucks
Fitment Verification Warning: Large-scale power arrays demand exact electronic component synchronization. Confirm part number 522-1644 maps accurately to your blueprint specs. Send us your engine arrangement information for structural fitment verification.

Enterprise Support Commitments

We provide excellent parts backed by responsive after-sales service. Every component is manufactured, updated, and tested relative to original factory specifications.

Transactions cover item lines, shipping, and processing fees. Destination import clearance tariffs or custom handling taxes are the exclusive duty of the Buyer.