More Information for ARNOTT P3221
{Alternate Inventory Numbers: P-3221}
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ARNOTT P3221  
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ARNOTT P3221 Specifications
Air Fitting Size0.2mm
Air Spring System TypeElectric
Dryer IncludedYes
Full Load Amperage30
Maximum Pressure180 psi
Mounting Bracket IncludedYes
Protective Cover IncludedYes
Valve Block IncludedYes
Wiring Harness IncludedNo
Working Pressure170 psi
This Arnott air suspension compressor is a direct replacement for the original OE compressor from BMW. The Arnott compressor is manufactured using quality components and is built to OE specifications. This maintenance-free compressor is extensively tested by Arnott engineers to assure durability along with OE like performance, functionality and fit. This compressor is assembled with a vehicle-specific support bracket and includes all mounting hardware for a fast and easy installation. This replacement compressor comes with an integrated air dryer unit, valve block, thermal overload protection, vibration isolator kit, exact fit electrical connector and airline fitting.
Installation Information

Air Compressor failure is typically the result of a leak or other issue in the air suspension system. To ensure that your new compressor will work without issue, you should do the following, prior to installation:

  • Check for blown fuses and ensure the relay is working properly. A failed Air Suspension Compressor Relay is a top cause of air compressor failure. They normally fail in the “closed” position and should be replaced during compressor installation
  • Check and replace the Air Springs if they are showing signs of cracks, deterioration, moisture, or are leaking. Complete Air Strut assemblies, which include the Mount and Air Spring, can be found in the Strut category
  • Verify that the air line and wiring harnesses are connected without signs of physical damage
  • Ensure that the fittings and valve connections are fully seated and undamaged. Make sure that the air line is secured at the proper depth
  • Check the electrical connections and the orientation of the Ride Height Sensor arms
  • Check all Air Suspension Solenoid connections and fittings; inspect for any cracks or other damage
  • Inspect the air lines for kinks, holes or other damage

Looking To Convert Your Air Suspension To a Coil Over Suspension?

If you like the load-leveling capabilities, or if you tow with your vehicle, then you should repair the original air suspension system.

If not, and you are tired of the high cost of replacing air suspension components, conversion components can be found for most vehicles under the Coil Spring, Strut / Coil Spring / Mount Assembly and/or Suspension Conversion Kit categories, in the RockAuto catalog, depending on the vehicle setup.

Additional Resources

Installation Instructions
OEM / Interchange Numbers: 37206789938, 37206799419, 37206859714, 37226775479, 37226785506, P2655, P2872

ARNOTT Warranty Information:
Limited Lifetime. Outside US - 2 Years
Warranty Details