The ARB CKMA12 Single Motor Onboard 12V Air Compressor is a compact, proven, and ultra-reliable source of onboard air for any off-road vehicle.Built with a hard anodized cylinder bore, Teflon impregnated carbon fiber piston seal, and sealed motor housing, the CKMA12 provides years of trouble free performance with minimal maintenance.

This compressor includes a pressure cut off switch, eliminating the need for a check valve. The 9-foot power harness provides flexible mounting options throughout the vehicle, while the wiring harness includes diode protected circuits for accessory power and illumination. The onboard manifold ports support solenoids for ARB Air Lockers, and optional air couplers can be added to build out your air system.

Includes:

• ARB CKMA12 Single 12V Onboard Compressor
• 9 ft heavy duty power harness
• Wiring harness with relay, switch, and diode protected accessory/illumination wires
• Pressure cut off switch (no check valve needed)
• Anodized heat dissipating mounting bracket
• Over-pressure safety valve
• All required hardware
• Installation instructions

Specifications

• Voltage: 12V
• Power Harness Length: ~9 ft
• Construction: High strength engineering grade materials
• Cylinder Bore: Hard anodized for reduced friction
• Piston Seal: Teflon-impregnated carbon fiber
• Motor Protection: Internally thermal protected
• Sealing: Moisture and dust resistant housing
• Manifold Ports: Two ports designed for ARB Air Locker solenoids
• Wiring Harness:Switch harness includes diodes in red/yellow & blue/white trace wires (accessory & illumination)
• Maintenance:Dry system (only requires purging moisture if unused for extended periods)
• Safety:
  -Built in pressure cut off switch
  -Heavy duty maxi-fuse inline protection
  -Over pressure safety valve

Fitment

• Universal for any 12V-equipped vehicle:
• Rock crawlers, buggies, and Ultra4-style rigs
• Jeeps, trucks, SUVs, and overland builds
• UTVs/SxS (with proper mounting and wiring)
• Trailers, expedition vehicles, and service rigs
• Compatible with:
• ARB Air Lockers (direct solenoid support on manifold)
• ARB Pump Up Kits (requires included T-piece)
• ARB inflation tools & tire accessories

Tech Insight

The ARB CKMA12 is engineered as a lightweight, reliable air source for tire inflation and locker activation. The built-in pressure cut-off switch automatically stops the compressor at a preset pressure, which means you do not need a check valve in the system. This feature simplifies installation and improves long-term reliability.

Another key detail: while the motor side of the compressor does not include diode protection, the switch harness does, safeguarding the accessory and illumination circuits during operation. This ensures smoother, interference-free switching and prevents backfeed into the system.

Because the CKMA12 is a dry system, the only long-term maintenance required is purging air/moisture from the system if the compressor sits unused for extended periods. The manifold includes two ports specifically designed for installing ARB Air Locker solenoids, making this compressor a solid foundation for a full onboard air + locker system.