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Lippert 379804 Kwikee 25 Series Step Motor and Gearbox Upgrade Kit for Pre-2006 Electric RV Entry Steps

Lippert 379804 Kwikee 25 Series Step Motor and Gearbox Upgrade Kit with IMGL assembly and 510 control unit for pre-2006 electric RV entry steps
Lippert Kwikee 25 Series Step Motor/Gearbox Upgrade Kit
 
List Price: $940.69
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Part Number: 379804
Manufacturer: Lippert

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Lippert / Kwikee Part No. 379804 25 Series Step Upgrade Lippert 379804 -- Kwikee 25 Series Step Motor and Gearbox Upgrade Kit

Stop wrestling with a sluggish or dead electric entry step. This complete upgrade kit from Lippert replaces the worn motor, gearbox, control electronics, and door-switch on pre-2006 Kwikee 25 Series steps -- giving you reliable, quiet step operation without replacing the entire step assembly.

Complete Drive-System Refresh for Kwikee 25 Series Steps

Kwikee 25 Series electric steps were factory-installed on a huge range of Class A, Class C, and fifth-wheel RVs built before 2006. After years of outdoor exposure, road vibration, and repeated cycling, the motor, gearbox, and control board are typically the first components to fail -- and they almost always fail together. Lippert engineered the 379804 kit to address all three failure points in a single service event.

Rather than sourcing a motor here, a gearbox there, and hunting down a compatible control board separately, the 379804 bundles an updated IMGL motor/gearbox assembly, the matching 510-series control unit, and a replacement door switch into one confirmed-compatible package. Every component is designed to work together and to mount directly to the existing 25 Series step chassis with no fabrication.

IMGL Motor and Gearbox Assembly

Updated integrated motor/gearbox unit replaces the original drive assembly on 25 Series steps. Direct bolt-on fit to existing step chassis.

510 Series Control Unit

Matched 510 control board included. Governs extend/retract logic, timing, and door-interlock function for the 25 Series platform.

Door Switch Included

Replacement door-actuated switch ships in the box. The door switch is a frequent wear item on high-cycle steps and is often the root cause of step malfunctions.

Pre-2006 Fitment

Engineered specifically for Kwikee 25 Series steps manufactured before 2006. Verify your step series and manufacture date before ordering.

What Is Included in Kit 379804

This kit contains every component needed to restore the electric drive system of a Kwikee 25 Series step:

  • IMGL motor and gearbox assembly (updated design)
  • 510 series electronic control unit
  • Door switch

Hardware and step treads are not included. The kit addresses the motor, gearbox, control electronics, and door switch only. The existing step linkage, tread plates, and mounting brackets are reused.

Why Upgrade Instead of Replace the Whole Step?

Full step assembly replacements require matching the step width, number of treads, and mounting bolt pattern to your specific coach cutout -- a job that often involves cutting and resealing. If your step frame and linkage are mechanically sound, replacing only the drive system with kit 379804 is faster, less invasive, and preserves the original factory fitment.

Identifying Your Kwikee Step Series

Kwikee manufactured several step series -- 24, 25, 26, and others -- that look similar but use different motor mounting configurations and control boards. Using the wrong kit will result in incompatible connectors or a motor that does not seat correctly in the gearbox housing.

  • Locate the Kwikee label on your step motor housing or on the step frame.
  • The series number (e.g., "25") and manufacture date are typically stamped or printed on that label.
  • This kit is for 25 Series steps manufactured before 2006 only.
  • Post-2006 25 Series steps use a revised gearbox design and require a different kit.

12V DC Wiring -- No New Wiring Harness Needed

The 510 control unit connects to the existing 12V DC wiring harness in your RV. In most installations the factory connectors plug directly into the new control unit with no splicing. The door switch uses the same two-wire circuit as the original. Confirm connector types during disassembly before cutting any wiring.

Common Symptoms This Kit Resolves

  • Step does not extend or retract when door is opened or closed
  • Step moves slowly or stops mid-cycle
  • Motor hums but step does not move (gearbox failure)
  • Step extends but does not retract, or vice versa (control board or door switch fault)
  • Step operates intermittently depending on temperature or vibration

Confirm Step Series Before Ordering

Part 379804 is NOT compatible with Kwikee 24 Series, 26 Series, or any post-2006 25 Series steps. Using an incompatible motor/gearbox assembly can damage the step linkage. If you are unsure of your step series, locate the Kwikee identification label on the step frame or motor housing before purchasing.

Maintenance Tips After Installation

  • Apply a light coat of white lithium grease to the step linkage pivot points after installation.
  • Test step operation through at least 10 full extend/retract cycles before your first trip.
  • Inspect the door switch alignment -- a misaligned switch is the leading cause of premature control board failure.
  • Check all wiring connections for corrosion annually, especially if the coach is stored in humid or coastal environments.

Kit Identification

ManufacturerLippert Components (Kwikee)
Part Number379804
SKU / Vendor Part93-4595
UPC098854097741

Compatibility

Step SeriesKwikee 25 Series electric entry steps
Manufacture DatePre-2006 production only
Step Drive TypeElectric 12V DC motor-driven
NOT Compatible WithKwikee 24 Series, 26 Series, or post-2006 25 Series steps

Kit Contents

Motor/Gearbox AssemblyIMGL integrated motor and gearbox (updated design)
Control Unit510 series electronic control board
Door SwitchReplacement door-actuated switch included
Step TreadsNot included
Step Linkage/FrameNot included -- existing hardware is reused
Wiring HarnessNot included -- connects to existing factory harness

Electrical Specifications

Operating Voltage12V DC
Control Type510 series demand-activated control unit with door-interlock logic
Door Switch CircuitTwo-wire, normally open, door-actuated

Application Notes

Typical Coach TypesClass A motorhomes, Class C motorhomes, fifth wheels, travel trailers with factory Kwikee 25 Series steps
Installation TypeDirect replacement -- no fabrication required on compatible pre-2006 25 Series steps
Service EventReplaces motor, gearbox, control board, and door switch in a single kit

Important Information -- Read Before Installing

  • Verify your step series and production date before installing. This kit fits Kwikee 25 Series steps built before 2006 ONLY. Installing on the wrong series or post-2006 steps can cause mechanical damage.
  • Disconnect 12V power to the step circuit at the fuse or breaker before beginning any disassembly.
  • Do not exceed the step's rated load capacity. Upgrading the motor and control unit does not increase the step's structural weight rating.
  • Door switch alignment is critical. A misaligned door switch can cause the control board to fail prematurely or the step to extend while driving.
  • This kit does not include step treads, linkage, or frame hardware. Inspect all mechanical components for wear or corrosion before reassembly.
  • If the step does not complete a full cycle after installation, check door switch alignment and wiring polarity before assuming a defective component.


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