North American Bus Industries 40-LFW

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40-LFW Diesel
Years of manufacture 1997 to 2015
Length 40 feet
Width 102 inches
Power/Fuel Diesel, diesel-electric hybrid, CNG, LNG

The North American Bus Industries 40-LFW is a 40 foot low floor transit bus. The first order of was placed by Valley Metro for the cities of Phoenix and Tempe in 1998. After purchasing NABI, New Flyer announced they will replace their product line with their own. The last 40-LFW buses built were for Houston Metro and Dallas DART.


The 40-LFW has a low floor front section with steps up to a high floor section before the rear wheels. It is available in two- or one-door configurations and choice of wide or narrow doors. A wheelchair ramp may be specified at the front or rear door.

The 40-LFW uses a carbon steel structure that is phosphate coated to protect from corrosion. Wheel housings, stairwells, main electrical compartment and battery compartment are stainless steel. Body panels are either aluminum or fibreglass. An option for an SAE 304 stainless steel structure was introduced in 2011.

When launched, the 40-LFW shared its body styling with the high floor 416. A headlight revision in 2002 had optional round LED turn signals in lieu of the rectangular incandescent bulb signals that wrapped around the corner.

NABI introduced the redesigned 40-LFW in 2008, with the Regional Transportation Commission of Southern Nevada (RTC) as the launch customer. A sleek, curved front replaced the angular front of the original design. The rectangular headlights were replaced with recessed, round headlights in a bezel that followed the curvature of the A-pillar. The rear of the bus remained largely the same. The same year, NABI produced a diesel-electric hybrid version of the 40-LFW for the RTC and Broward County Transit.

Another redesign, dubbed the LFW Gen III, was introduced in 2011. It is available with a two-piece or optional single-piece windshield with integrated destination sign area. The position of the headlights is similar to that on the NABI BRT series, but with different bezels. A centre panel has a chamfered cut-out under the windshield. The roof enclosures on hybrid and natural gas models have sloping ends with recessed accents and vents along the sides. Features that were introduced with the Gen III included all-electric cooling, all-electric HVAC, LED headlights, and composite sub floor.

Photo gallery


40 feet
Width: 102 inches
Roof Height: 114 inches
Wheelbase: 276 inches
Turn Radius: 44 feet
Engine Emissions Availability
Caterpillar C9 8.8L or 9.3L, 285 hp EPA 2004, 2007 Diesel, 2003 to 2009
Cummins C8.3G 8.3L, 275 hp CARB 1996, EPA 1997, LEV LNG, CNG, 1997 to 2001
Cummins ISB6.7 6.7L, 260 hp EPA 2010 Hybrid, 2010 to 2015
Cummins ISL/ISL9 8.9L 280 hp EPA 2004, 2007, 2010 Diesel or hybrid, 1999 to 2015
Cummins ISM 10.8L, 280 hp EPA 1998, 2004, 2007 Diesel, 1999 to 2010
Cummins M11 10.8L, 280 hp EPA 1998 Diesel, 1997 to 1999 (never used)
Cummins Westport C Gas Plus 8.3L, 280 hp EPA 2004 CNG, LNG, 2001 to 2008
Cummins Westport ISL G 8.9L, 280 hp EPA 2007, 2010, 2013 CNG, LNG, 2007 to 2015
Detroit Diesel Series 50 EPA 1998 Diesel, 1997 to 2000
Detroit Diesel Series 50 EGR EPA 2004 Diesel, 2000 to 2005
Detroit Diesel Series 50G/Series 50 MK-G EPA 1998, 2004 CNG, LNG, 1997 to 2005
Transmission Availability
Allison B400R Standard, 1997 to 2015
ZF 4/5HP590 1997 to 2001
ZF 5/6HP592C 2001 to 2007
ZF 5/6HP594C 2007 to 2010
ZF 6AP1400B 2010 to 2015
Hybrid System Availability
Allison EP40/H 40 EP 2007 to 2015
Brakes Availability
S-Cam Standard, 1997 to 2015
All-wheel disc
Thermo King


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Demonstrator/engineering units

Thumbnail Build
VIN Engine Transmission Notes
1997 1N940LFW9VA140001 Cummins C8.3G Allison B400R
  • LNG & CNG Demo.
  • Altoona test bus from October 2, 1997 to June 2, 1998 (LNG) and April 22, 1999 to January 21, 2000 (CNG).
  • First NABI 40-LFW built.
1999 1N9040078XA140190 Cummins ISM Allison B400R
0321 2003 1N90402403A140360 Cummins Westport C Gas Plus Allison B400R
  • CNG Demo.
  • Altoona test bus from September 24, 2003 to October 1, 2003.
2005 1N9040E145A140138 Caterpillar C9
1313 9/2011 1N9403668BA140339 Cummins ISL9 Allison H 40 EP
  • Diesel-Electric Hybrid.
  • Altoona test bus from July 31, 2013 to April 11, 2014.
NABI - a brand of New Flyer Industries
(all models discontinued as of 2015)
High Floor 416436
Low Floor (LFW) 30-LFN31-LFW35-LFW40-LFW60-LFW
Low Floor (BRT) 37-BRT42-BRT60-BRT65-BRT
Low Floor (Composite) 30C-LF40C-LFWMetro 45C (45C-LFW)