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Espar / Eberspacher Airtronic B4L M2 (Petrol) 12v (4kW) Heater Kit - NEW ECU'S

(4 reviews) Write a Review
(You save $463.00 )
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  • Espar / Eberspacher EasyStart Pro Timer 221000352200 - Image 01
  • Controller / Modulator for Eberspacher Airtronic D2 D4 - Image 04

2019 version Espar / Eberspacher Airtronic B4L M2 12v Air Heater With Installation Kit


Espar Airtronic gasoline heater, ideal for gasoline / petrol vehicles.  Brand new brushless motor has extended Airtronic service life to 5,000 hours. New motor, control system and fuel metering pump improvements lead to noticeable noise reduction. 

Airtronic B4L is equipped with automatic altitude adjustment as standard - NO ADDITIONAL HIGH ALTITUDE KIT REQUIRED!

Perfect solution for Promaster heating and Transit heating


Fuel type: Petrol / Gasoline

Voltage: 12 Volts

Max Power 4 kW


  • Espar Eberspacher Airtronic B4 12v Heater
  • Fuel pump (12v)
  • Fuel hose
  • Exhaust Silencer
  • Electrical harnesses
  • Stainless steel exhaust pipe
  • Fuel Standpipe  - 300mm
  • Combustion intake pipe 
  • Flexible ducting 
  • Inlet / Outlet grills
  • Air outlet
  • Screws, clips and plastic straps required for installation
  • Installation manual
  • Warranty documentation 

Ideal for heating:

  • Truck
  • Van ( Promaster Heater , Transit heater)
  • Campervan
  • Caravan
  • Horse Box
  • Mobile Workshop
  • Boat (requires marine kit)

Eberspacher / Espar Part Number:

  • 20.1987.05.0000 201987050000 (Heater)
  • 20 1987 05 0000 / 20 1987 05 00 00
  • 25.2720.80.0000 252720800000  (Installation kit)
  • 25 2720 80 0000 25 2720 80 00 00

Shipping Times:

  • United States - 1 Working Day
  • United Kingdom - 1 Working Day
  • Western Europe - 2-3 Working Days
  • Eastern Europe - 3-5 Working Days
  • Scandinavian Countries - 2-3 Working Days
  • Australia / New Zealand - 2-3 Working Days
  • Rest of World - 2-4 Working Days
Warranty Included

4 Reviews Hide Reviews Show Reviews

  • 5
    Great heater, even at 9,000 ft!

    Posted by Drew on 24th Feb 2020

    This heater works great for a van like a Promaster. It has now kept us warm for many nights running for 8 hours or more at a time, even at elevations of 9,000 ft. I give the heater five stars.

    However, it did take some time for to get me the correct heater. They accidentally shipped the diesel model of this heater. After taking weeks to clear customs, I had to send the heater back so they could ship the correct one. Quite the problem when shipping international and resulted in about 6 weeks or more from when I placed the order, until I received the correct unit. I also swapped out mounting plates for the flat mounting plate, but have not received a refund for that difference.

  • 5
    Highly recommend

    Posted by Remington on 22nd Dec 2019

    The install wasn't too difficult, the installation kit came with everything I needed (and more) and the heater is working well so far! The instructions aren't the best but if you stare at it long enough you'll figure it out haha..

  • 3

    Posted by Danny on 17th Dec 2019

    This is the latest espar 14k btu petrol heater and the manufacturer had huge problems with the control units so I suggest you get a unit from later batches. I ordered this kit as soon as it was introduced so it had that shitty ECU - took some time to sort out but heatso were really helpful and I now have the new type ECU which seems to be working fine. Overall it is a good heater just make sure you get the latest model with latest ECU version!!! The merchant is fine - very friendly and helpful guys.

  • 5
    Espar Airtronic B4L M@

    Posted by LMS on 14th Oct 2019

    Excellent heater for my high roof Transit!