309-5710 20R-2352 Engine Control Module ECM for Caterpillar 320E 336F 349F Excavator
309-5710 engine control module (ECM), fits for Caterpillar E and F series hydraulic excavators from 312E to 390F.
- Interchangeability: 309-5710 / 3095710 / 20R-2352 / 20R2352
- Application: 312E–318F, 320E–329F, 330F–349F, 352F–390F excavators, 538–568 FM forestry, MH3295 material handler
- Programming Required: Module must be flashed to your engine serial number — send us your ESN, VIN and data plate photo after purchase
- Wide Fitment, One Module: Over 80 machine variants share this reference — check the number on your existing unit before ordering
$1,999.00
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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
This engine control module (ECM / ECU) is a new aftermarket replacement for part numbers 309-5710 and 20R-2352, built as a direct-fit unit covering Caterpillar E and F series hydraulic excavators across the full size range — from 312E compact machines through 336F and 349F up to 390F, plus material handlers and forestry variants.
A dead ECM puts an excavator on the ground, and on a working site that is measured in days of lost hire or contract time rather than in the cost of the part. This module covers over eighty machine variants across four size classes, which makes it one of the most commonly needed control modules in the E and F series fleet — and one worth confirming carefully, because the breadth of the fitment list is exactly what makes ordering by machine model alone unreliable.
- Direct replacement fitment — matches the original mounting pattern, connector layout and harness routing, so no wiring modification or bracket fabrication is required.
- New condition — supplied unused, in plain protective packaging without third-party branding.
- Full excavator size range — 312E and 313F compacts, 320E and 323F mid-size, 336D2 through 349F large, and 352F, 374F and 390F heavy classes.
- Beyond standard excavators — also covers 538, 548, 558 and 568 FM forestry machines, the MH3295 material handler and mobile hydraulic power units.
- XE and VG variants included — 336D2 XE, 336F XE, 349F LXE, 352F XE VG and 352F-VG hybrid and variable geometry machines.
- Sealed and vibration-resistant housing — die-cast aluminium enclosure with sealed connectors, built for excavator engine-bay heat, dust and continuous vibration.
- Function-restoring, not performance-altering — supplied to restore original operating parameters; no calibration changes of any kind are made to the unit.
- 6-month warranty — repair or replacement service if any fault appears within the period.
Important: Programming Is Required Before Use
This module is not plug-and-play. Every engine carries its own calibration file, and the unit must be flashed to your specific serial number by a qualified technician using approved diagnostic software before the machine will run correctly. With a fitment list this broad, the same hardware serves a 312E and a 390F — only the correct calibration makes it work on yours.
Please send us the following after purchase:
- Engine Serial Number (ESN) and Vehicle Identification Number (VIN)
- Clear photographs of your current ECM / ECU unit
- A clear photograph of the engine data plate
Installation and removal of an engine control module should always be carried out by an experienced technician. Lower the boom, disconnect the battery and isolate the machine before any work begins.
Fitment & OEM Interchange
The following reference numbers are listed for cross-reference and identification purposes only. All trademarks belong to their respective owners.
| Primary Reference Number | 309-5710 / 3095710 |
| Additional Cross-Reference | 20R-2352 / 20R2352 |
| Condition | New — unused, plain protective packaging |
| Installation | Direct replacement — programming required |
Application Chart — Compatible with Caterpillar Excavators
| Size Class / Category | Models |
|---|---|
| Excavator — 312 to 318 | 312E, 312E L, 313F, 313F L, 314E CR, 314E LCR, 315F LCR, 316E L, 316F L, 318E L, 318F L |
| Excavator — 320 to 329 | 320E, 320E L, 320E LN, 320E LRR, 320E RR, 320F L, 323E L, 323E LN, 323E SA, 323F, 323F L, 323F SA, 324E, 324E L, 324E LN, 325F LCR, 326F L, 326F LN, 329E, 329E L, 329E LN, 329F L |
| Excavator — 330 to 340 | 330F, 330F L, 330F LN, 335F LCR, 336D2, 336D2 GC, 336D2 L, 336D2 L XE, 336D2 XE, 336E, 336E H, 336E L, 336E LH, 336E LN, 336E LNH, 336F, 336F L, 336F L XE, 336F LN, 336F LN XE, 336F XE, 340D2 L, 340F, 340F L, 340F L LRE, 340F L UHD |
| Excavator — 349 to 390 | 349E, 349E L, 349E L VG, 349F, 349F L, 349F LXE, 352F, 352F XE VG, 352F-VG, 374F, 374F L, 390F, 390F L |
| Forestry Machine | 538, 548, 558, 568 FM, 568 FM LL |
| Log Loader / Forestry | 558 |
| Material Handler | MH3295 |
| Mobile Hydraulic Power Unit | 329E, 330F, 336E, 336E HVG, 336F, 349E, 349E L HVG, 352FMHPU, 390F, C7.1 |
| Special Solution (OEM) | 320E, 330F OEM, 352F OEM |
Before ordering: this reference covers more than eighty machine variants across four size classes and several build years. Within a single model designation there can be more than one module variant depending on build date, emissions specification and market. Compare the number stamped on your existing module’s data plate against the reference numbers above, and if your label does not appear in this list, send us a photo of the plate along with your ESN and we will confirm fitment before you buy.
Technical Specifications
| Part Name | Electronic engine control module / engine control unit (ECM / ECU) |
| Reference Numbers | 309-5710, 3095710, 20R-2352, 20R2352 |
| Condition | New — unused, supplied in plain protective packaging |
| Installation Method | Direct replacement — no wiring or bracket modification |
| Programming | Required — must be flashed to your engine serial number |
| Machine Types Covered | Hydraulic excavators, forestry machines, material handlers, mobile hydraulic power units |
| System Voltage | 24V DC typical — application dependent, confirm on data plate |
| Housing Material | Die-cast aluminium with sealed gasket interface |
| Connectors | Sealed multi-pin harness connectors, original pin layout |
| Circuit Protection | Conformal-coated PCB, moisture, dust and vibration resistant |
| Testing | 100% functional bench test under simulated load |
| Warranty | 6 months — repair or replacement service |
| Package Contents | 1 x engine control module (mounting hardware not included) |
This unit is an emissions-related component. It is supplied to restore factory-specified performance only, and is not modified, re-calibrated or altered in any way.
Common Failure Symptoms
A failing engine control module rarely dies all at once. These are the symptoms excavator operators and fleet technicians report most often before replacement, and the checks worth running first.
| Symptom | What It Usually Points To |
|---|---|
| Engine cranks but will not start | No injector drive signal reaching the fuel system; verify power and ground at the module before condemning it. |
| No communication with diagnostic software | Data link failure between the module and the service tool; check the connector and harness continuity first. |
| Machine derates under load | Common on excavators — the machine digs normally at light load but loses power on a full bucket. Often a failing module acting on corrupted boost or rail pressure input. |
| Intermittent shutdown while working | Cracked solder joints or a failing internal supply that drops out under heat and the constant vibration of tracked operation. |
| Faults appear only when slewing or tracking | Movement-triggered faults usually mean a chafed harness or a loose connector rather than the module — check the loom where it crosses the house-to-frame transition first. |
| Repeat injector driver fault codes | Output driver stage failure — codes return on multiple cylinders after new injectors are fitted. |
| Erratic or impossible sensor readings | Degraded internal reference voltage causing false pressure or temperature values across several channels at once. |
| Rough running or unstable idle | Inconsistent timing or fuelling control that persists after fuel system components have been ruled out. |
| Corrosion or moisture inside the connector | Failed housing seal allowing water or washdown ingress onto the board — usually terminal once the PCB is affected. |
Rule out the cheap causes first. Battery condition, ground straps, charging system voltage, harness chafing and corroded pins imitate module failure far more often than the module itself. On excavators the harness is the usual culprit — it flexes with every slew and track movement, so faults that come and go with machine motion are almost always wiring, not the ECM. Confirm with a full diagnostic scan before replacing.
Shipping & Quality Guarantee
- 100% quality control — every module is functionally bench-tested and visually inspected before it leaves our facility.
- Dispatch in 1–3 business days via DHL, UPS or FedEx express, with tracking provided within 24–48 hours.
- Protective packaging — anti-static bag, foam-cushioned carton, sealed against moisture for international transit.
- 6-month warranty — if a fault arises within the period, we provide repair or replacement service.
- Technical support — send us your ESN, VIN and data plate photo and our team will confirm fitment before and after purchase.
Shipping & Customs Notice
The listed price covers the product, shipping and handling only. It does not include import duty, VAT, GST or any local taxes or customs clearance charges. Any such fees are levied by your national customs authority and remain the buyer’s responsibility. Please check your local import regulations before ordering.
All brand names, part numbers and model designations are used for identification and cross-reference purposes only. This product is manufactured and tested to aftermarket replacement standards and is not associated with, sponsored by or endorsed by any vehicle or engine manufacturer. All trademarks are the property of their respective owners.
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