Is there an alternative product for the Eberspacher D3L heat exchanger wick?

Question

Is there an alternative product for the Eberspacher D3L heat exchanger wick?

This question is related to Eberspacher heater D3L wick heat exchanger liner | 251482060006.

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Answers (3)

Answered by Butler Technik's David Butler
Posted 21st August, 2026 at 13:20 by David Butler

Unfortunately Eberspacher do not supply an alternative. I am not aware of any other supplier that has created a replacement either - it's quite an old heater design, not so many of the early generation D3L heaters are still in operation. 
thank you, 

please let me know if you'd like a quote for an upgrade kit for your installation, to fit the latest generation Eberspacher M3 D4R. 
 

Posted 21st August, 2026 at 13:32 by Ben
Yes please could you send me a quote for a replacement upgrade. Also the procedure for returning the service parts i recently purchased from you. They are now not needed.
Posted 21st August, 2026 at 15:19 by Matthew Varlow

To upgrade from the Eberspacher D3L 12v, we would typically recommend the Eberspacher M3 D4R Upgrade kit.

https://www.butlertechnik.com/item/Eberspacher/D3LC-D5LC-to-Airtronic-M3-D4R-Heater-Changeover-Kit-12v-4kw/CDZ

If you believe a 2.2kw system would be sufficient, it could be possible to upgrade to the Eberspacher S3 D2L and convert the outlet hood to accept 75mm ducting - https://www.butlertechnik.com/item/Eberspacher/D1L-D1LC-Compact-to-Airtronic-S3-D2L-Heater-Changeover-Kit-24v-2kw/CO7

The M3 D4R kit includes:

  • A Genuine Eberspacher Airtronic M3 D4 R 12 volt heater & fuel pump
  • Eberspacher Easy Start Pro - 7-Day Timer Diagnostic Controller
  • Complete wiring harness and extension for Easy Start Pro
  • 75mm ducting outlet hood (90mm available please contact)
  • A comprehensive installation CD

If you are upgrading your marine heater, additional parts may be required: 

I hope this helps.

King regards, 

Matt

 

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