New Flyer Industries DE40LF

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New Flyer DE40LF
New Flyer DE40LF
DE40LF with original battery enclosure.
Years of manufacture 1998 to 2010
Length 40 feet
Width 102 inches
Propulsion Diesel Electric Hybrid
New Flyer DE40LF
DE40LF with low profile battery enclosure.

The New Flyer Industries DE40LF is a hybrid version of the popular D40LF model by New Flyer Industries. Although New Flyer introduced its first diesel-electric hybrid bus in 1998 (originally designated as H40LF), they did not start mass producing them until about 2001.

The first DE40LFs, serials 23422-23423, were delivered to Tri-Met in Portland, OR, USA. They are numbered 2561-2562.

In 2007, New Flyer introduced a restyled low-profile enclosure for the DE40LF/R. Currently, it is featured on SEPTA's DE41LFs, as well as on St. Catharines Transit's DE40LFs (and other DE40LFRs).

After the 2009 model year, New Flyer no longer offers the LF series of buses with the traditional style front and rear ends. In November 2009, New Flyer updated their website and removed the LF models from their lineup. The DE40LF has been replaced by the DE40LFR. Production for some existing orders of the D40LF continued to the end of 2010.


In 2007, some models were given the name DE41LF to reflect added length to the bus with the Cummins ISL engine and Allison parallel hybrid system. However later models were given back the DE40LF designation.



  • Cummins ISB (series hybrid, 1998)
  • Cummins ISB EPA 2004, 5.9L (parallel hybrid, 2001-2005)
  • Cummins ISB EPA 2007, 6.7L (series hybrid, 2007-2009, exists as demo only)
  • Cummins ISL EPA 2004, 8.9L (parallel hybrid, 2002-2007)
  • Cummins ISL EPA 2007, 8.9L (parallel hybrid, 2007-2009)

Hybrid System


  • ACQ Pressure Preserved Plywood subfloor
    • Altro Transfloor
    • Tarabus


  • Thermo King T11 rear mounted
  • Thermo King roof mounted (introduced in 2008 with SEPTA)


  • MAN
  • Meritor (no longer offered after 2007)


Canada Flag of Canada.png

United States Flag of the United States.png

Demonstrator and engineering units

Below is a list of known demonstrator and engineering buses.

Fleet number Thumbnail Year VIN Engine Hybrid system Notes
2001 5FYD2LR061U023549 Cummins ISB 280 hp
Cummins ISL 330 hp[1]
Allison EP40 System
  • Demoed with RTC
  • Provided Canadian International Autoshow Shuttle in 2004.
  • Some sources state the bus had an ISL, but the VIN code states it was delivered with an ISB.
Aug. 2005 5FYH4FR155B027891 Cummins ISB Allison EP40 System
? Cummins ISB ISE ThunderVolt ISE prototype.


New Flyer Industries
Current Models

Battery-Electric: 35ft: XE35 - 40ft: XE40 - 60ft: XE60
Compressed Natural Gas (CNG): 35ft: XN35 - 40ft: XN40 - 60ft: XN60
Diesel: 35ft: XD35 - 40ft: XD40 - 60ft: XD60
Diesel-Electric Hybrid: 35ft: XDE35 - 40ft: XDE40 - 60ft: XDE60
Electric Trolleybus: 40ft: XT40 - 60ft: XT60
Hydrogen Fuel Cell: 40ft: XHE40 - 60ft: XHE60

Past Models

Compressed Natural Gas (CNG): 30ft: C30LF - C30LFR - 35ft: C35LF - C35LFR - 40ft: C40 - C40LF - C40LFR
Diesel: 30ft: D30LF - MD30 - 35ft: D35 - D35LF - D35LFR - MD35 - 40ft: D40 - D40LF - D40LFA - D40LFR - D40S - D40i - 45ft: D45S - 60ft: D60 - D60LF - D60LFA - D60LFR
Diesel-Electric Hybrid: 30ft: DE30LFR - 35ft: DE35LF - DE35LFA - DE35LFR - 40ft: DE40LF - DE40LFA - DE40LFR - DE40i - 60ft: DE60LF - DE60LFA - DE60LFR
Electric Trolleybus: 40ft: E40LF - E40LFR - 60ft: E60 - E60LFR
Gasoline-Electric Hybrid: 35ft: GE35LFR - 40ft: GE40LF - GE40LFA - GE40LFR
Hydrogen-Electric Hybrid: 40ft: HE40LF
Hydrogen Fuel Cell: 40ft: F40LF/H40LF - H40LFR
Liquified Natural Gas (LNG): 30ft: L30LF - 35ft: L35LF - 40ft: L40 - L40LF - L40LFR

Platform Invero - Low Floor - MiDi - Xcelsior