ECM Controllers & Monitors
4 product photos · Swipe on mobile, or hover and select a thumbnail.
Cat 386-3457 is an operator monitor group for real-time machine-condition monitoring. The official record specifies an 18-32 V operating range, ABS monitor casing, a pigtail, two 12-pin connectors and an RCA jack. Manufacturer-listed excavator applications include 320D, 336D, 349D and many related D-series models. Cat lists 20R-9083 as the remanufactured operator-monitor alternative. Four selected owned photographs show the matching monitor housing, controls and attached harness.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Cat Part Number | Official operator-monitor identity | 386-3457 |
| Same-number Formatting Variant | Search alias only | 3863457 |
| Manufacturer-listed Reman Alternative | Cat Reman operator monitor | 20R-9083 |
Product fitment guide
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Before ordering
Machine fitment
4 model references
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Recorded compatible model references include Popular Cat excavators: 320D / 324D / 325D / 329D / 330D / 336D / 345D / 349D, Additional official excavators: 311D LRR / 312D / 312D2 / 313D / 315D / 318D / 319D / 323D / 326D / 328D / 340D / 365C / 374D / 385C / 390D families, Other official equipment: M330D wheeled excavator; 385C front shovel; M325D material handlers; 3512 generator set, Fitment limitation: Confirm 386-3457, 18-32 V range, front controls, pigtail, connector layout and machine serial before shipment. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: 20R-9083. Formatting aliases for the same number: 3863457.
Match the complete part number on the original component label. Compare the front layout and visible configuration with the product photos. Compare connector count, connector shape and keying before installation. Send clear photos of the original unit and connector layout when requesting a quote.
Continue comparing verified references from the same system.
ECM Controllers & Monitors21918597 Control Unit for Volvo Penta D4 D6 TAD and TWD Engines21918597
ECM Controllers & Monitors8-97246510-1 12V Glow Plug Timer for Isuzu 4JG1 Multiquip DCA-45USJ8-97246510-1
ECM Controllers & Monitors634-0538 12V Digital Camera for Cat 320, 323, 336, 349, 352 and 395 Excavators634-0538
ECM Controllers & MonitorsSECD-315C Display MonitorSECD-315C
