BYD Auto K11M

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BYD Auto K11M
Years of manufacture 2014 to present
Length 60 feet
Width 100 inches
Power/Fuel Electric

The BYD Auto K11M, also called the "Lancaster", is a low floor, articulated battery-electric transit bus. The bus was launched at the 2014 American Public Transportation Association Expo in Houston, Texas. The first customer to take delivery of the 60-foot electric bus was the Antelope Valley Transit Authority in May 2017. The 13 buses are part of their campaign to fully electrify its fleet by 2018.[1]

Initially, the K11M promised a range of 170 to 200 miles or 273 to 321 kilometres in an urban environment. It could be fully charged in two to three hours.[2][3] By 2019, a high capacity battery option was available and increased the range to 220 miles or 354 kilometres. Though by 2021, specifications advertised a revised working range of 193 miles or 311 kilometres.

Like the 12-metre BYD Auto K9, the K11M uses in-wheel traction motors (on the 'C' axle) and iron-phosphate batteries. The outward appearance was quite different from the K9 at the front and rear ends along with a more rounded roofline. On production buses, the appearance of the K11M is in line with BYD’s K9MC and K9S.



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Demonstrator and engineering units

Below is a list of known demonstrator and engineering buses.

Fleet number Thumbnail Date VIN Motor Notes
Sept. 2014 4B9KCLA55F2038001
  • Chassis no. CK6190DJEV
  • Launch vehicle at 2014 APTA Expo
  • Gold base paint
  • Trialed w/ LACMTA Dec. 2014
  • Trialed with STL Laval in March 2016
  • Trialed with GTA transit systems (inc. DRT, MiWay, YRT) in Apr. 2016
  • Displayed at 2016 Ontario Transportation Expo
  • Displayed at 2016 CUTA Trans-Expo
  • Latin American demonstrator
  • Silver base paint
  • Doors on both sides
February 2019 4B9KCLA54J2038032
  • Doors on both sides
  • Tested at Altoona from March 1-October 22, 2019
August 2019 4B9KCGA84K2038003
  • Doors on both sides
  • Demonstrated with TransLink in October 2019 but never went into revenue service


  1. BYD, AVTA unveil first 60-ft. artic battery-electric bus. 04 May 2017. Metro Magazine.
  2. Kane, Mark. “ BYD Unveils World's Biggest Electric Bus.” InsideEVs, 19 October 2014.
  3. ”First 60-Foot Articulated Battery-Electric Bus in North America Hits the Streets in Antelope Valley, California.” BYD USA, 09 May 2017.