This is a new, genuine Kubota engine control unit (ECU) sub-assembly, part number 1H043-59092. Kubota’s parts description reads “ECU SUB ASSY 03 CPG”. Kubota sells several ECU sub-assemblies that differ by the code at the end of that description, such as 03 CTP and 03 TOR, and each one is its own part number.

An ECU is usually replaced after water damage, a burned driver circuit or a failed connector, once wiring, grounds, sensors and battery voltage have been ruled out. Because the ECU carries the engine’s control calibration, order by the number on your old ECU’s label, not by engine model alone.

Specifications

Fits / Applications

• Direct replacement for a Kubota ECU sub-assembly labeled 1H043-59092 (03 CPG)

Plan for Kubota Diagmaster work with this swap. Kubota trains its dealers to program blank ECUs on electronically controlled Kubota diesel engines with Diagmaster, and on Kubota common-rail engines the injector correction data is written to the ECU again when the ECU is replaced. Check battery voltage, grounds and connector pins before and after installation.

Part Numbers & Cross Reference

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

How do I know Kubota 1H043-59092 is the right ECU for my engine?

Order by the number on your old ECU’s label, not by engine model alone. This one is a direct replacement for an ECU labeled 1H043-59092 with code 03 CPG. Call 530-668-0818 with that label number, your engine model and serial number, and we will confirm the match at no charge before anything ships.

Can a Kubota ECU with code 03 CTP or 03 TOR replace the 03 CPG unit?

Do not assume so. Kubota ECU sub-assemblies look alike, but each code is its own part number and the ECU carries the engine’s control calibration. Match the number and code on your old ECU label.

Does a new 1H043-59092 ECU need programming?

Plan for Kubota Diagmaster work with this swap. Kubota trains its dealers to program blank ECUs with Diagmaster, and on Kubota common-rail engines the injector correction data is written to the ECU again when the ECU is replaced.

Is 1H043-59092 new, and do I have to send my old ECU back?

It is a new, genuine Kubota ECU sub-assembly in original packaging, sold by an authorized Kubota dealer. It is sold outright with no core charge, so there is nothing to send back.

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Why Buy From Valley Fuel Injection

We are an authorized Kubota dealer and a diesel fuel-injection shop in Woodland, CA, working on diesel engines since 1993. When you call, you talk to people who know Kubota engines and can help you match the part number to your engine serial or machine model before you order. See our Kubota engine sales, parts and service.