VIAIR 400P EF Automatic Portable Compressor

Short Product Summary

The VIAIR 400P EF Automatic is an updated version of VIAIR's 400P Automatic, built for 4x4s, overlanders, touring vehicles and campers running oversized tyres. Its Enhanced Flow (EF) technology and automatic pressure control mean less standing around after you've aired down for sand, rocks or corrugations.

Why This Product

Aired-down tyres need pumping back up before you're back on the tar, and a slow compressor turns that into the longest part of the stop. VIAIR built the 400P EF Automatic to speed the job up, with an updated compressor head that manages heat better over a long inflation session and an automatic pressure system that makes the job simpler.

Key Features

• Enhanced Flow (EF) Technology – VIAIR rates it up to 10% faster to inflate tyres and up to 20% greater in overall performance than the previous 400P Automatic
• Automatic pressure system – makes inflating simpler, with less to manage while you work
• Tyre inflation gun with built-in gauge – check and adjust pressure on the go without a separate gauge
• Quick-connect hose with heat shield – built for longer inflation sessions
• Primary and extension hoses included – for extra reach around the vehicle
• Patented I-Beam sand tray – keeps the compressor stable when you're working on sand or uneven ground
• SAE power connection – opens up other VIAIR power accessories and connection options

Ideal For

• 4x4 owners on oversized tyres who air down often and want a quicker turnaround pumping back up
• Overlanders and touring vehicles covering long distances where a dependable compressor matters
• Campers on gravel and dirt roads adjusting tyre pressure regularly between tar and rougher going

Local Support from 4Matt Campers

Not sure if the 400P EF or another VIAIR portable suits your tyres? Ask our Cape Town team before you order.

Technical Specifications

• Brand: VIAIR
• Technology: Enhanced Flow (EF) compressor head with improved heat dissipation
• Operation: Automatic pressure system
• Inflator: Tyre inflation gun with integrated pressure gauge
• Air Hose: Quick-connect with integrated heat shield, plus primary and extension hoses
• Power Connection: SAE power cord and dual battery clamps
• Base: Patented I-Beam sand tray
• Rated Performance: Up to 10% faster tyre inflation and 20% greater overall performance than the previous 400P Automatic

What's Included

• VIAIR 400P EF Automatic compressor on an I-Beam sand tray
• Tyre inflation gun with pressure gauge
• Primary and extension air hoses
• Inflation accessories and tips
• Carry bag

Optional Fitment / Upgrade Notes

A couple of things worth knowing before you order:

• The 10% and 20% figures are how VIAIR compares this model to the previous 400P Automatic; your actual fill time will still depend on your tyre size and starting pressure
• It runs on VIAIR's SAE power connection, so check which power accessories or connectors you already have, or ask us to confirm compatibility
• Tell us your tyre size and how you use the vehicle, and we'll confirm whether this or another VIAIR portable gives you the airflow you need

Complete Your Setup

Add a recovery kit for the trail, browse VIAIR's air tanks and accessories, or compare it with our other portable compressors.

FAQ

How much faster is the 400P EF than the previous 400P Automatic?
VIAIR rates it up to 10% faster to inflate tyres and up to 20% greater in overall performance than the previous 400P Automatic.

Does it come with a pressure gauge?
Yes, the tyre inflation gun has an integrated pressure gauge, so you can check and adjust pressure as you go.

What keeps it stable on sand?
It sits on a patented I-Beam sand tray designed to keep it steady on soft or uneven ground.

How is it powered?
It uses VIAIR's SAE power connection along with dual battery clamps, so it's compatible with a range of VIAIR power accessories.

Is it only for oversized tyres?
It's built with oversized off-road tyres in mind, but it also suits touring vehicles, campers and caravans.