---
product_id: 259292489
title: "Viair 400P - 40045, Automatic Function Portable Compressor Kit, Tire Pump, Truck/Suv Tire Inflator, Silver, For Up To 35 Inch Tires"
brand: "viair"
price: "¥114318"
currency: JPY
in_stock: true
reviews_count: 5
category: "Viair"
url: https://www.desertcart.jp/products/259292489-viair-400p-40045-automatic-function-portable-compressor-kit-tire-pump
store_origin: JP
region: Japan
---

# 12V heavy-duty power Fills 35" tire in under 3 mins IP54 dust & water resistance Viair 400P - 40045, Automatic Function Portable Compressor Kit, Tire Pump, Truck/Suv Tire Inflator, Silver, For Up To 35 Inch Tires

**Brand:** viair
**Price:** ¥114318
**Availability:** ✅ In Stock

## Summary

> 🚙 Inflate Like a Pro, Adventure Without Limits!

## Quick Answers

- **What is this?** Viair 400P - 40045, Automatic Function Portable Compressor Kit, Tire Pump, Truck/Suv Tire Inflator, Silver, For Up To 35 Inch Tires by viair
- **How much does it cost?** ¥114318 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/259292489-viair-400p-40045-automatic-function-portable-compressor-kit-tire-pump)

## Best For

- viair enthusiasts

## Why This Product

- Trusted viair brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerful & Compact Design:** Gearless direct drive motor delivers 150 PSI max pressure in a sleek, portable package.
- • **Trusted Offroad Companion:** 25+ years of American engineering ensures reliable performance wherever your adventure takes you.
- • **Durability Meets Convenience:** Includes 25 ft 5-in-1 hose, heavy-duty brass connectors, and a rugged carry bag for on-the-go readiness.
- • **Effortless Automatic Inflation:** Built-in PSI regulator auto shuts off to prevent over-inflation—set it and forget it.
- • **Versatile Multi-Vehicle Compatibility:** Perfect for trucks, SUVs, Jeeps, motorcycles, and even mountain bikes up to 35" tires.

## Overview

The Viair 400P 40045 is a 12V portable air compressor designed for offroad and everyday use, delivering up to 150 PSI with an automatic shut-off feature. Compact yet powerful, it inflates large tires up to 35 inches in under 3 minutes, featuring a durable build with IP54 protection, a 25 ft multi-function hose, and premium accessories—all engineered for reliable, quiet, and maintenance-free operation.

## Description

Viair 400P - 40045, Automatic Function Portable Compressor Kit, Tire Pump, Truck/Suv Tire Inflator, Silver, For Up To 35 Inch Tires : Viair: desertcart.ae: Electronics

Review: Viair is top of the line as far as I’m concerned. It is well built and constructed with quality components. This is my second unit. I also have one for my RV. I tried this unit out today and I am dutifully impressed. The gauge is spot on accurate so no need to double check the pressure with a small handheld gauge. It seems to be quieter than my older unit and it is also smaller and lighter. This 400P Automatic is the way to go because it has a built-in PSI regulator that turns the unit off when it is not being used. Meaning it doesn’t run continuously when turned on. Big big upgrade from the regular 400P and I highly recommend this version. I think it is definitely worth the extra cost. This compressor is going to be kept in my Jeep for off-road adventures. Super happy with this upgrade.
Review: I wish all compressor had auto on/off. To use it, simply turn it on. It will pressurize the hose and will then turn off. Then you can pump the tires. As you pump (press the lever on the air chuck) the compressor detects a pressure drop, and turns on. Very cool. So you just leave it on, and once you are done with all tires you then turn it off. The hose is nice quality. Light. The connectors on hose are brass. The air chuck and gauge are heavy duty. You can use a third party one if you like. Standard 1/4 NPT connectors are used throughout. The unit is very quiet when running, and does not vibrate like crazy. Comes with a nice rubber pad under the metal plate. Comes with a handy bag. Overall very happy. Wish it was made elsewhere though, I would be willing to pay extra for that.

## Features

- HIGH PERFORMANCE *AUTOMATIC* OFFROAD COMPRESSOR (Model: 40045, 12V, 150 PSI, 35" Tires) - The 400P Portable Truck Air Compressor is 12V heavy-duty electric air compressor for offroad enthusiasts. Its powerful, direct drive gearless motor and maintenance-free operation are perfect for tackling tough terrain. Ultra-compact and storable in its own carrying case.
- EXPLORE WITHOUT LIMITS: Trucks, SUVs, Jeeps, Offroad Vehicles, 4x4s, Side-by-Sides, RVs, Motorcycles, Road Bikes & Mountain Bikes. *Instructions: Attach the battery clamps to your vehicle’s battery and start the engine. Connect to a valve stem and turn the unit on. When required, use the included bicycle Presta valve adapter.
- INCLUDED COMPONENTS: 12V mini air compressor tire inflator has a 25 ft 5-in-1 inflator/deflator air hose with inline 100 PSI gauge, 8 ft power cord, deluxe dual-compartment carry bag, 3 inflation tips (3/16" nozzle, 5/16" nozzle, and needle adapter), and Presta Valve Adapter. Features: Aluminum I-Beam sand tray, thermal overload protector, 40-Amp inline fuse holder, press-on tire chuck.
- HIGH CAPACITY SPECS for LARGE TIRES: Powered by 12 volts, this small but mighty electric air compressor with a permanent magnetic motor delivers a maximum working pressure of 150 PSI with a 33% duty cycle @ 100 PSI; Free flow capacity: 2.3 CFM. Maximum Recommended Tire Size: 35". Fills a 35" tire from 15 to 30 PSI in 2 min. 45 sec or less. IP54 rating protects against dust and water spray from any direction. Dimensions: 10.87″L x 5.83″W x 7.48″H; 10.70 lbs.
- DEPENDABLE QUALITY: VIAIR offroad compressors offer you the freedom to explore further and challenge boundaries. For over 25 years, our American owned and operated company has provided top-quality portable air compressors & inflators. Our commitment to durability, continuous testing, and refinement results in long-lasting performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000X9B32M |
| ASIN  | B000X9B32M |
| Air Flow Capacity | 3 Cubic Feet Per Minute |
| Amperage Capacity | 30 Amps |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #58,987 in Automotive ( See Top 100 in Automotive ) #358 in Wheel & Tire Air Compressors & Inflators |
| Color | Silver |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,240) |
| Customer reviews | 4.8 4.8 out of 5 stars (1,240) |
| Date First Available | 1 January 2024 |
| Date First Available  | 1 January 2024 |
| Hose Length | 30 Feet |
| Included components | alligator clamps, 40 amp inline fuse |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 4.85 Kilograms |
| Item model number | 40045 |
| Item model number  | 40045 |
| Manufacturer | Viair Corporation |
| Manufacturer  | Viair Corporation |
| Material | Metal Plastic |
| Maximum Power | 360 Watts |
| Maximum Pressure | 150 Pound per Square Inch |
| Noise Level | 74 Decibels |
| Number Of Pieces | 1 |
| Part number | 40045 |
| Power source type | Battery Powered |
| Product Dimensions | 27.61 x 14.81 x 19 cm; 4.85 kg |
| Product Dimensions  | 27.61 x 14.81 x 19 cm; 4.85 kg |
| Special Features | Automatic Shut-Off, Heavy Duty, Portable, Quick Inflation |
| Style | portable offroad |
| Voltage | 12 Volts |

## Product Details

- **Brand:** VIAIR
- **Noise level:** 74 Decibels
- **Power source:** Battery Powered
- **Recommended uses for product:** Tire Inflation
- **Voltage:** 12 Volts

## Images

![Viair 400P - 40045, Automatic Function Portable Compressor Kit, Tire Pump, Truck/Suv Tire Inflator, Silver, For Up To 35 Inch Tires - Image 1](https://m.media-amazon.com/images/I/51lEUKCXqhL.jpg)

## Questions & Answers

**Q: Can this unit be used with a normal electric outlet or do I need to buy an ac/dc convertor when I want to use it in the garage without a battery?**
A: This unit is strictly a 12 volt DC powered compressor. If you wish to use this on house current, you will need to use a 12 volt DC power supply which could handle the required amperage. I would suggest a small car or lawn mower battery of at least 100 ampere capacity. Put a trickle charger on it and you would good to go. Most of these battery powered compressors will draw considerable current during operation and they will get hot so be sure to take care when operating and keep the compressor clear of any combustible items.

**Q: What does the “automatic” refer to?**
A: According to a customer Service rep at Viair, the 440P-auto does NOT let the user set a desired pressure and then automatically shut off when the tire reaches that pressure. All it does is shut off when it meets the compressors max rated pressure. Perhaps the service rep did not know what he was talking about, but if that's all it does, the feature is just about useless: If you pump a typical tire up to 150 PSI, you most likely have already damaged the tire.

**Q: What is automatic about it? does it shut off a a set psi?  i want all my tires at 32**
A: Hello,
The automatic feature is not a "set it and forget it" type. You will still have to manually control the pressure for each tire. Our portable compressors with the automatic feature really helps when moving from tire to tire, and when checking tire pressure in the middle of a tire fill. Non automatic compressors must be turned off between tire fills, and anytime you want to check tire pressure. That means you'll be running back and forth to the compressor turning the unit on and off. The automatic feature will save you time & effort to get tires inflated quickly.

Thanks,
VIAIR Corp
949-585-0011

**Q: Must you continuously hold the lever on the inflation gun to inflate a tire? Seems like that would be very tiresome to do anything but add a few lbs.**
A: It doesn’t take that long to fill em. I’d rather hold the chuck in one hand and and a beer in the other than get distracted and forget it. The original filler clip fell off the stem a lot and made it a 2 hand job so I got another one at Home Depot for 20 bucks. I carry regular chucks and lots of other spare parts like valve stems and covers. When I air down I pull the stems right out. When I’m filling  I have a small fold up stool to sit on (or my cooler)and a digital gauge. I always have extra valve covers too. Most of the stuff Fits in a pill bottle. I carry an extra 25’ hose in case. Happy trails.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***V on 18 September 2025*

Viair is top of the line as far as I’m concerned. It is well built and constructed with quality components. This is my second unit. I also have one for my RV. I tried this unit out today and I am dutifully impressed. The gauge is spot on accurate so no need to double check the pressure with a small handheld gauge. It seems to be quieter than my older unit and it is also smaller and lighter. This 400P Automatic is the way to go because it has a built-in PSI regulator that turns the unit off when it is not being used. Meaning it doesn’t run continuously when turned on. Big big upgrade from the regular 400P and I highly recommend this version. I think it is definitely worth the extra cost. This compressor is going to be kept in my Jeep for off-road adventures. Super happy with this upgrade.

### ⭐⭐⭐⭐⭐ Review
*by I***R on 23 March 2022*

I wish all compressor had auto on/off. To use it, simply turn it on. It will pressurize the hose and will then turn off. Then you can pump the tires. As you pump (press the lever on the air chuck) the compressor detects a pressure drop, and turns on. Very cool. So you just leave it on, and once you are done with all tires you then turn it off. The hose is nice quality. Light. The connectors on hose are brass. The air chuck and gauge are heavy duty. You can use a third party one if you like. Standard 1/4 NPT connectors are used throughout. The unit is very quiet when running, and does not vibrate like crazy. Comes with a nice rubber pad under the metal plate. Comes with a handy bag. Overall very happy. Wish it was made elsewhere though, I would be willing to pay extra for that.

### ⭐⭐⭐⭐⭐ Review
*by J***. on 19 March 2017*

Perfect for my needs. I previously had an ARB dual compressor which I got included with a used vehicle purchase. Was going to transfer it over to my new Toyota tacoma, but it was just too large to fit anywhere. All the locations that it could be mounted either were planned for a different item. Under the hood where it could mount is the same place my second battery is going. Only other place would've been somewhere under the truck which I am not a fan of, or behind one of the back seats, but by doing so would lose the entire storage behind said seat. Was not prepared to do so, so sold the ARB and bought this. Sure its not going to fill my tires as fast. The ARB filled my 33" as fast if not faster than this fills my 32" tire on the truck. But its much more compact and its not significantly slower. I have no need to run air tools anymore so this works fine for my needs. Its also much smaller so I can put it behind the seat in the back along with plenty of other gear. At about 1/3 of the price, its more than enough for my needs. Took about 12min to air up from roughly 16PSI back to 30PSI on all 4 tires. My sleeping pad for camping is one of the self inflating as well so no need to inflate other stuff. If you need a 100% duty cycle for air tools and airing up beds and other inflatables like tubes for water sports, then the ARB is probably your better option. The Viair that's 100% duty cycle is complete garbage, as its CFM is way to low and you'll be there for almost 30min airing up tires. But if all you need is to inflate tires up to a 35" and maybe a soccer ball or something here and there this will do more than enough. This probably could inflate a mattress no problem as well, I just haven't had to so haven't tried it.

## Frequently Bought Together

- VIAIR 400P/40045 Automatic Portable Compressor, Tire Inflator Kit, Air Compressor for Truck, Jeep, SUV, and Car Tires, Portable Air Pump Kit, Car Accessories, 33% Duty Cycle, 150 PSI/2.30 CFM
- ARB ARB505 Deflator Kit 10-60 PSI Tire Pressure Gauge Rapid Air Down Offroad Kit With Recovery Gear Pouch (PSI)
- ARB 10000011 Speedy Seal 2 - Universal Heavy Duty Tire Repair Kit For Car, Truck, RV, Jeep, ATV, Motorcycle, Tractor, Trailer. Flat Tire Puncture Repair Kit Fix Punctures and Plug Flats 50 String Plug

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-22*