This is a brand new aftermarket voltage regulator rectifier for the Kawasaki KAF 400 Mule, built as a direct replacement for the original unit. Installation is plug-and-play and direct fit, with no assembly required. The regulator rectifier turns the alternating current from the stator into direct current and then caps the charging voltage so the battery and the rest of the electrical system see a steady supply. On a working utility vehicle that spends its life carrying loads and running accessories, a failed regulator quickly shows itself as a battery that will not stay charged.
The unit uses a higher grade of electric components than the original and the quality exceeds the OEM equipment. Every unit is tested before it is shipped. A second connector for the main harness side is included in the box, because the original connectors are often found melted, corroded or defective and renewing the plug at the same time as the regulator removes the most common cause of a repeat fault.
Key Features
- Brand new aftermarket voltage regulator rectifier
- Direct replacement for the original unit
- Plug-and-play, direct fit, easy installation
- No assembly required
- Higher grade of electric components
- Quality exceeds the OEM equipment
- All units are tested before shipping
- Second connector for the main harness side included
Technical Specs
| Specification |
Detail |
| Part number |
RMS020-107175 |
| Width |
110 mm |
| Length |
80 mm |
| Height |
28 mm |
| Fixation holes, centre to centre |
84 mm |
| Number of plugs |
2 |
| Number of pins |
4 |
| Number of wires |
0 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
Less than 15 V |
| Operating temperature |
-20 C to 85 C |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model |
Years |
| Kawasaki KAF 400 Mule |
2019-2026 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 21066-0767 |
Kawasaki |
Frequently Asked Questions
Will this fit without modifying the wiring?
Yes. It is a direct fit, plug-and-play replacement for the original unit on the Kawasaki KAF 400 Mule. No assembly is needed and the standard loom does not have to be cut or spliced. The mounting holes are 84 mm apart, centre to centre.
What is included?
The voltage regulator rectifier plus an additional opposite connector for the main harness side, so the plug on the vehicle can be renewed at the same time. Every unit is tested before dispatch.
How do I know the old regulator has failed?
The common signs are a battery that goes flat overnight or will not hold charge, dim or flickering lights, and a charging voltage at the battery terminals that sits outside the normal range. This unit holds a minimum charging voltage of 14.5 V +/- 0.5 V with an open circuit voltage below 15 V, so a reading well outside that band on the old part points at a regulator failure.
This unit has no wires - is that right?
Yes. This regulator is a connector-only design with two plugs and four pins and no flying leads, which is how the original is built on this Mule. The mating plugs on the vehicle harness push straight on.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
