309‑5710 ECU Controller Computer Board For CAT Excavator Engine ECU Control Unit
High‑quality aftermarket 309‑5710 computer board assembly, original‑equivalent engine control unit for Catr excavator electronic system repair and replacement.
Key Features
- Standard OEM part number 309‑5710, perfect plug‑and‑play match for target CAT machinery
- High‑precision mainboard chip, stable signal processing, accurate engine control and fault diagnosis
- Strict program burning & function testing before shipment, no program error, stable operation
- Waterproof, dust‑proof and anti‑interference circuit design, adapts to harsh construction site environments
- Exact pin definition and wiring layout same as original, direct installation without modification
- Anti‑aging electronic components, long service life and low failure rate under continuous working conditions
- Supports engine speed control, fuel injection regulation, fault code monitoring and data feedback
- Wide compatibility with multiple CAT excavator & engine models
Product Information
| Item |
Specification |
| Part Number |
309‑5710 |
| Product Name |
ECU / Controller / Computer Board / Engine Control Module |
| Material |
High‑Grade Circuit Board, Industrial‑Grade Chips & Electronic Components |
| Function |
Engine Control, Speed Regulation, Fuel Injection Control, Fault Diagnosis, Signal Processing |
| Application |
CAT Excavator, Heavy‑Duty Construction Machinery |
| Condition |
Brand New Aftermarket Replacement |
Related Products
| Category |
Replaceable Part Numbers / Compatible Models |
| General OEM Series |
309‑5710, 3095710, 286‑3686, 286‑3687 |
| Compatible Excavator Models |
320D, 323D, 324D, 325D, 329D, C6.4 Engine Series |
Fitment Application
- Suitable for Cat D‑series medium excavators equipped with C6.4 engine, widely used in construction machinery electronic system overhaul and repair workshops.





Q1: What is the OEM part number?
A1: Main part number is 309‑5710.
Q2: Which engine & excavator does it fit?
A2: Mainly for CAT C6.4 engine, compatible with 320D, 323D, 324D D‑series excavators.
Q3: Is the program pre‑installed?
A3: Yes, pre‑programmed, plug‑and‑play directly.
Q4: Can it be installed directly?
A4: OEM standard pin definition, no modification needed.
Q5: What is the main function?
A5: Control engine working status, fuel injection, speed and fault diagnosis.