Moderate — 2–4 hours
Description
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | WEBASTO |
| Part Number | W040 3390919A |
Videos
Webasto SmarTemp Control 2.0 Instructional Video for Webasto Air Heaters
Webasto Air Heater - Medium Duty Application
2023 RAM Promaster Amazon Butler Technik Gas Webasto Heater Installation
Webasto Coolant Heater - Medium Duty Application
VAN BUILD | WEBASTO HEATER INSTALL| A SIMPLE BREAKDOWN
The Best How-To Video: Step-by-Step Webasto Heater Install Part 1 (Van Life Build)
The Webasto SmartControl and MultiControl explained
Webasto Coolant Heater Install | 1st Gen Cummins
Webasto Diesel Heater Operation
A review of the Webasto Diesel Heater in Alaska - Airtop 2000 STC
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy