157-3165 20R-2315 ECM Controller for Caterpillar CAT 320C 325C 330C Excavator
157-3165 / 20R-2315 ECM ECU controller for Caterpillar 312C–330C excavators.
- Interchangeability: Cross-references 157-3165, 1573165, 20R-2315, 20R2315.
- Application: Fits for Caterpillar 312C–330C excavators, M325C MH and 325C / 330C power units.
- Programming Required: After ordering, send your ESN, VIN and photos of the ECM label and engine data plate.
- Condition: Remanufactured unit; direct replacement in the stock location.
$1,100.00
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Bench-Tested - Every unit powered up and function-tested before dispatch.
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6-Month Warranty - From delivery, against defects in materials and workmanship.
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30-Day Returns - Unused items in original packaging. RMA required.
Product Details
The 157-3165 / 20R-2315 Remanufactured ECM Controller is a direct replacement electronic control module, fits for Caterpillar 312C–330C Excavators, M325C MH Wheeled Excavators and 325C / 330C Mobile Hydraulic Power Units.
Each remanufactured module is disassembled, inspected and restored to the published 157-3165 part-number specification. Before dispatch every unit is powered up on the bench and function-tested for power-up, communication and input/output response, so it is ready to be configured for your machine and restore factory-specified control of the engine.
- Reference Numbers: 157-3165 (1573165) and 20R-2315 (20R2315)
- Condition: Remanufactured
- Function: Electronic control unit that manages engine operation according to the machine’s factory-specified parameters
- Installation: Direct replacement — mounts in the stock location and connects to the existing machine harness
- Machine Range: C-series hydraulic excavators, wheeled excavator and mobile hydraulic power units (see Fitment chart)
- Programming: Required before use — see notice below
Programming Required — Information Needed After Purchase: This ECM must be programmed to match your specific engine and machine before it will operate correctly, as every engine has specific configuration requirements. After placing your order, please send us:
- Engine Serial Number (ESN)
- Vehicle Identification Number (VIN) / machine serial number
- Clear photos of your current ECM label (part number visible)
- A clear photo of the engine data plate
Installation Notes: Installation and removal of the engine control module should be carried out by an experienced technician. Turn the key off and disconnect the battery before unplugging the ECM, keep connectors clean and dry, and verify operation with a service tool after the module has been programmed.
Fitment & OEM Interchange
Brand names and part numbers are used for reference and compatibility identification only. This is an aftermarket remanufactured replacement part.
Part Number Cross-Reference (OEM Interchange)
| Primary Part No. | Interchange Part No. | Compatible Equipment |
|---|---|---|
| 157-3165 / 1573165 | 20R-2315 / 20R2315 | For Caterpillar C-Series Excavators, Wheeled Excavator & Mobile Hydraulic Power Units |
Application Chart
| Machine Category | Compatible Models |
|---|---|
| Excavator — Fits for Caterpillar | 312C, 312C L, 315C, 318C, 319C, 320C, 320C L, 320C FM, 321C, 322C, 325C, 325C L, 330C, 330C L, 330C LN, 330C MH, 330C FM |
| Wheeled Excavator — Fits for Caterpillar | M325C MH |
| Mobile Hydraulic Power Unit — Fits for Caterpillar | 325C, 330C |
Technical Specifications
| Specification | Detail |
|---|---|
| Part Name | ECM Controller — Electronic Engine Control Unit Module |
| Reference Numbers | 157-3165, 1573165, 20R-2315, 20R2315 |
| Condition | Remanufactured |
| Installation Method | Direct replacement, connects to existing machine harness |
| Programming | Required — ESN, VIN and data plate photos needed after purchase |
| System Voltage | Application dependent, confirm on data plate |
| Housing Material | Application dependent, confirm on data plate |
| Connectors | Matches stock harness connectors for the listed part numbers |
| Circuit Protection | Application dependent, confirm on data plate |
| Testing | Bench-tested — powered up and function-tested before dispatch |
| Warranty | 6 months from delivery against defects in materials and workmanship |
| Package Contents | 1 × Remanufactured ECM Controller |
This module is intended solely to restore factory-specified performance and operating parameters. It is programmed to the engine’s factory configuration and does not modify emission control functions or engine output.
Common Failure Symptoms
| Symptom | What It Usually Points To |
|---|---|
| Engine cranks but will not start, with no fault lamp activity | ECM not powering up or not controlling fuel delivery |
| Service tool cannot connect to the engine control module | Loss of ECM communication on the data link or an internal module fault |
| Monitor shows a controller or communication error on the excavator display | ECM dropping off the machine data link, or a connector problem |
| Engine speed dial or auto-idle no longer changes RPM | ECM not reading throttle inputs or not responding to speed commands |
| Engine stalls, surges or hunts at steady speed | Intermittent ECM operation, unstable power supply, or internal fault |
| Multiple unrelated sensor codes appear at the same time | Shared sensor supply voltage from the ECM failing, or a harness short |
| Problems appear only after the machine warms up or in wet weather | Heat-related internal failure or moisture in the ECM connectors |
| Engine will not start after a battery or welding incident | Voltage spike damage to the control module |
Shipping & Quality Guarantee
- Bench-Tested: Every unit is powered up and function-tested before dispatch
- Fast Dispatch: Dispatched in 1–3 business days
- Free Express Shipping: DHL / FedEx / UPS, delivered in 3–8 business days
- Tracking: Tracking number provided within 24–48 hours of dispatch
- Protective Packaging: Anti-static bag and padded carton for safe transit
- 6-Month Warranty: From delivery, against defects in materials and workmanship — repair or replacement provided
- 30-Day Returns: Unused items in as-received packaging, RMA required
- Technical Support: Send your ESN, VIN and data plate photos for fitment and programming confirmation
All brand names, trademarks and part numbers are used for compatibility reference only. LIUCHUANG Parts is an independent aftermarket parts supplier and is not affiliated with or endorsed by any equipment manufacturer.
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