372-2906 3722906 Engine Control Module ECM for Caterpillar 345D 349D C9
372-2906 ECM for Caterpillar 345C, 345D, 349D and 6015 shovels.
- Interchangeability: Replaces 372-2906 / 3722906. Existing bracket and harness connectors, no rewiring.
- Application: Fits for Caterpillar 345C / 345D / 349D, 6015 & 6018 shovels, 770, 772, 657E, 3512, C175-16.
- Programming Required: Ships unflashed — engine software, and set ratings, must be loaded by a workshop.
- Check Your Variant: Mobile, petroleum package and locomotive builds differ — order from the ECM label.
$1,399.00
-
Bench-Tested - Every unit powered up and function-tested before dispatch.
-
6-Month Warranty - From delivery, against defects in materials and workmanship.
-
30-Day Returns - Unused items in original packaging. RMA required.
Product Details
372-2906 (3722906) remanufactured engine control module — a direct-replacement ECM for Caterpillar 345C, 345D and 349D excavators, 6015 / 6018 hydraulic shovels, 770 and 772 trucks, 657 wheel scrapers, the 3512 generator set and C175-16 locomotive engine builds.
The machines this module runs are among the heaviest in the range, so the rebuild focuses on the stresses that come with them: sustained high underhood temperature and near-constant structural vibration. Cores are dismantled, boards are cleaned and inspected under magnification, and the power conversion stage, driver outputs and header solder joints are rebuilt with new components. The board is re-coated, the housing resealed, and every finished module is powered up on a bench harness and function-tested to factory-specified parameters before dispatch.
- Covers a strikingly mixed fleet from one number: large excavators and shovels, 770 / 772 trucks, 657 scrapers, the 836H compactor, the AP-755 paver and stationary 3512 and C175-16 engine builds.
- Direct replacement using the existing bracket and harness connectors — no machine-side modification.
- Rebuilt to restore original operating parameters; nothing in the calibration, protection or emissions strategy is altered.
- New components fitted in the power conversion and driver sections, which are the parts that give up first under sustained heat soak.
- Conformal-coated board and resealed die-cast housing, chosen with shovel and locomotive duty cycles in mind.
- Cross-referenced as 372-2906 and 3722906. The module ships bare and must be flashed — see the notice below.
Programming Required Before The Engine Will Run
This module contains no engine application software when it leaves us. It has to be flashed and configured for your specific unit by a workshop with dealer-level service tooling. On stationary 3512 and C175-16 installations, the rating and protection settings need configuring as well. Please send:
- Engine Serial Number (ESN) and Vehicle Identification Number (VIN), or the unit serial number for stationary installations
- Clear photographs of the existing ECM label with all numbers readable
- A photograph of the engine data plate including the arrangement number
- Machine or package model and serial prefix — for example 349D L, 6015 FS or CX35-P800
Use an experienced technician for removal and refitting. Isolate the batteries and the starting system first. On hydraulic shovels and locomotive installations, confirm the machine is properly locked out before opening the module connectors, and support the harness so its weight is not carried by the ECM headers while the unit is off.
Fitment & OEM Interchange
Caterpillar and CAT machine model designations appear below only to identify the equipment this aftermarket module is built to fit. The OEM interchange numbers listed are cross-reference data for identification purposes and do not imply that this part is made, supplied or endorsed by the trademark holder.
Part Number Cross-Reference
| Reference Number | Format / Role | Notes |
|---|---|---|
| 372-2906 | Primary reference, hyphenated | The format used across service documentation. |
| 3722906 | Same reference, no hyphen | Common in maintenance systems and online searches. |
| 372 2906 | Space-separated variant | Appears on quotations and workshop paperwork. |
Related Reference Numbers — Same Replacement Family
The reference numbers below sit in the same replacement family and turn up on machines with overlapping application lists. They are not automatically interchangeable — coverage varies by build date and engine arrangement, so read the label on the module currently fitted, or send us a photo of it, before you order.
| Reference Number | Typical Coverage Difference |
|---|---|
| 10R-5648 / 10R5648 | Remanufactured-numbered unit whose coverage overlaps this one across most of the large machine list. |
| 262-2879 / 2622879 | Weighted towards the smaller 324D to 329D excavators and 950H / 962H loaders. |
Application Chart — Fits For Caterpillar
| Machine / Engine Category | Models |
|---|---|
| Asphalt Paver | AP-755 |
| Cold Planer | PM-200, PM-201 |
| Excavator | 345C, 345C L, 345C MH, 345D, 345D L, 345D L VG, 349D, 349D2, 349D2 L, 349D L |
| Generator Set | 3512 |
| Hydraulic Shovel | 6015, 6015 FS, 6018 |
| Industrial Engine | C7, C9 |
| Integrated Toolcarrier | IT62H |
| Landfill Compactor | 836H |
| Locomotive Engine | C175-16 |
| Material Handler | M325D L MH, M325D MH |
| Mobile Hyd Power Unit | 345C, 345C L, 345D, 349D2, 349D L, TH43-C18 |
| Petroleum Engine | C7, C9, C18 |
| Petroleum Package | CX31-C15I, CX35-P800 |
| Shovel Logger | 345C |
| Truck | 770, 772 |
| Wheel Loader | 950H, 962H |
| Wheel Scraper | 657E, 657G |
| Wheel Tractor | 651B, 657B, 657E, 657G |
| Wheeled Excavator | W345C MH |
Before You Order
This module spans mobile machines, stationary power packages and locomotive engines, and those installations do not all use the same engine arrangement. Verify against the label on the module being replaced rather than the machine or package model. For 6015 / 6018 shovels and CX-series petroleum packages in particular, send us a photo of the existing module label and the data plate and we will confirm the fit before you commit.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Name | Electronic Engine Control Unit — ECM / ECU Module |
| Reference Numbers | 372-2906, 3722906 |
| Condition | Remanufactured — rebuilt from a tested core |
| Installation Method | Direct replacement — mounts to the existing bracket and mates with the existing machine harness |
| Programming | Required — application software and, on stationary installations, rating and protection settings must be loaded with dealer-level tooling |
| System Voltage | 24V nominal on the machines and packages listed — application dependent, confirm on the data plate |
| Housing Material | Sealed die-cast aluminium case with integral heat-sink face |
| Connectors | Sealed multi-pin engine and machine harness connectors — pin count is application dependent, match against the module being replaced |
| Circuit Protection | Reverse-polarity and transient suppression to factory-specified design; no protection features removed or bypassed |
| Testing | Powered up and function-tested on a bench harness before dispatch |
| Warranty | 6 months from delivery, against defects in materials and workmanship |
| Package Contents | 1 × engine control module. Brackets, harness, gaskets and software licences are not included. |
This module is supplied to restore factory-specified performance and original operating parameters only. Emissions-related calibration and engine protection strategies are left exactly as the factory defined them; we do not supply, alter or support any change to emissions control functions.
Common Failure Symptoms
Large shovels, haul trucks and locomotive engine installations tend to reveal a failing control module under load rather than at idle. The symptoms below are the ones that most reliably point at the module on this application group.
| Symptom | What It Usually Points To |
|---|---|
| Engine cranks strongly but never fires, with no injector solenoid activity | The driver bank or the internal supply that feeds it has failed. |
| Power falls away under sustained load while everything looks correct at idle | A module output stage failing only when it is loaded and hot. |
| Shovel or truck shuts down without warning and restarts after twenty minutes | A thermally intermittent fault inside the module — usually a fatigued joint or degraded capacitor. |
| Erratic engine speed readings on the display while the engine itself sounds steady | A failing speed input circuit inside the ECM rather than a sensor fault. |
| The service tool cannot reach the engine controller although the machine display works | Loss of the ECM data link transceiver, or its power and ground supply. |
| Fuel rail, boost and temperature circuits all flag faults in the same instant | The regulated sensor supply generated inside the module has collapsed. |
| Stationary 3512 or C175-16 unit trips on protection with normal sender readings | A drifted analogue input stage inside the module raising false protection alarms. |
| ECM configuration faults that return each time they are cleared | Corrupted internal memory holding the engine configuration. |
Rule Out The Cheap Causes First
On heavy machines the electrical basics are easy to overlook and expensive to ignore. Load-test the batteries, check the main ground path from the engine to the frame, confirm the ECM supply fuses and inspect both connectors for corrosion and back-out terminals. On shovels and locomotive installations, also check for chafed harness sections near the engine mounts — they mimic internal module faults very convincingly.
Shipping & Quality Guarantee
- Dispatch: orders are dispatched in 1–3 business days after the fitment details are confirmed.
- Free express delivery: DHL / FedEx / UPS, 3–8 business days door to door.
- Tracking: a tracking number is issued within 24–48 hours of dispatch.
- Bench-tested: every unit is powered up and function-tested before it leaves the workshop.
- 6-month warranty from delivery, against defects in materials and workmanship.
- 30-day returns on unused items in their original packaging; an RMA number is required before shipping anything back.
- Protective packaging: anti-static bag, foam-lined carton, connector caps fitted to keep the pins clean in transit.
- Technical support: send us your data plate photos and we will confirm the reference number before and after the sale.
Shipping & Customs Notice
The amount charged covers the product and shipping only. Import duties, VAT, GST, customs clearance charges and any other local taxes are not included and remain the responsibility of the buyer. Please check your own country’s import rules before ordering.
Caterpillar®, CAT® and all machine and engine model designations are the registered trademarks of their respective owners. We are an independent supplier of aftermarket replacement parts and have no affiliation with, sponsorship from or authorisation by the trademark holder. Reference numbers including 372-2906 / 3722906 are quoted purely as OEM cross-reference data to help you identify the correct fitment.
Reviews
Clear filtersThere are no reviews yet.