The worst 2021 Gillig Low Floor problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 13
Fuel system, diesel: delivery: hoses, lines/piping, and fittings
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2021-2026 Low Floor transit buses. The remote fuel filter hoses may separate from the fitting, causing a fuel leak and an engine stall.
- Risk
- A fuel leak in the presence of an ignition source increases the risk of a fire. An engine stall increases the risk of a crash.
- Remedy
- Cummins will replace the fuel hoses, free of charge. Owners may contact Cummins' customer service at 1‑800‑286‑6467 or Gillig's customer service at 1‑800‑735‑1500.
Recall number 26V707000 · Recall details
Fuel system, diesel: delivery: hoses, lines/piping, and fittings
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2021-2026 Low Floor transit buses. The air compressor intake pipe may contact and damage the fuel line.
- Risk
- A damaged fuel line may leak, increasing the risk of a fire.
- Remedy
- Gillig will inspect, replace, and reorient the intake pipe as necessary, free of charge. Owner notification letters were mailed April 24, 2026. Owners may contact Gillig's customer service at 1‑800‑735‑1500.
Recall number 26V142000 · Recall details
Equipment: appliance: tv/radio/speakers
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2019-2024 Low Floor transit buses. The rivet-nut fasteners that secure the TFT flat panel display monitor to the bus ceiling may fail, causing the monitor to detach and fall.
- Risk
- A monitor that detaches and falls from the ceiling increases the risk of injury.
- Remedy
- Gillig will replace the rivet-nut fasteners, free of charge. Owner notification letters were mailed March 18, 2025. Owners may contact Gillig customer service at 1‑800‑735‑1500.
Recall number 25V076000 · Recall details
Equipment: emergency: fire supression: wiring
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2021-2024 Low Floor style transit buses. The fire suppression relay cable may be damaged, chafing against the mounting bolt, and fail.
- Risk
- Failure of the fire suppression system can increase the risk of injury during a fire.
- Remedy
- Dealers will replace the relay cable, free of charge. Owner notification letters were mailed December 31, 2024. Owners may contact GILLIG customer service at 1‑800‑735‑1500.
Recall number 24V958000 · Recall details
Visibility: rearview mirrors/devices
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2021-2023 Low Floor vehicles. The rearview mirror electric adjustment system may have been manufactured with an incorrect fuse.
- Risk
- An incorrect fuse may overheat and increase the risk of a fire.
- Remedy
- Gillig will replace the protection fuse of the mirror control switch, free of charge. Owner notification letters were mailed January 15, 2024. Owners may contact Gillig customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 23V812000 · Recall details
Power train: driveline: driveshaft
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2019-2023 Low Floor transit buses. The transmission yoke may separate, resulting in driveshaft separation and a sudden loss of drive power.
- Risk
- A sudden loss of drive power can increase the risk of a crash. Additionally, a disabled bus may require an evacuation procedure in an uncontrolled traffic situation, increasing the risk of injury to passengers.
- Remedy
- Gillig will work with the equipment manufacturer, Allison Transmission Inc., to inspect and tighten the transmission yoke bolts, as necessary, free of charge. Owner notification letters were mailed December 11, 2023. Owners may contact Gillig customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 23V740000 · Recall details
Electrical system: propulsion system: traction battery
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2019-2022 Low Floor vehicles equipped with Cummins BP74E battery packs. The battery packs may develop a coolant leak internally, causing the battery pack to short circuit.
- Risk
- A battery short circuit increases the risk of a fire.
- Remedy
- Gillig will tighten the coolant fittings and replace the coolant, free of charge. Owner notification were mailed on August 16, 2022. Owners may contact Gillig's customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 22V548000 · Recall details
Electrical system: propulsion system: cables: fastener/connector
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2019-2022 Low Floor electric transit buses. The EV resolver cable connector may experience a loss of electrical connectivity, unexpectedly switching from Drive to Neutral with no warning.
- Risk
- An unexpected switch to neutral can cause a loss of vehicle propulsion and increase the risk of a crash.
- Remedy
- Dealers will install a redesigned resolver cable with extended length and a new support bracket, free of charge. Owner notification letters were mailed on August 3, 2022. Owners may contact Gillig's customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 22V436000 · Recall details
Electrical system: 12v/24v/48v battery
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2014-2021 Low Floor transit buses. The rear-mounted ultracapacitors may allow the engine to be started when the master battery disconnect switch is in the "OFF" position.
- Risk
- The engine may be started unexpectedly, increasing the risk of injury to anyone nearby the engine compartment during maintenance operations.
- Remedy
- Dealers will update the software for the buses equipped with the Vanner Ultracapacitor system, and conduct a hard rewire for the buses equipped with the KBI system, free of charge. Owner notification letters were mailed on June 22, 2022. Owners may contact Gillig's customer service at 1‑510‑264‑5073 for 1‑800‑735‑1500.
Recall number 22V276000 · Recall details
Fuel system, diesel: delivery: hoses, lines/piping, and fittings
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2020-2021 Low Floor vehicles equipped with Cummins L9 Diesel Engines that have remote Stage 2 fuel filters and pressurized hoses. A fuel leak may occur from the fuel hose between the fuel pump and the remote fuel filter head.
- Risk
- A fuel leak in the presence of an ignition source increases the risk of a fire.
- Remedy
- Cummins will replace the fuel hoses, free of charge. Owners may contact Gillig's customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 21V563000 · Recall details
Engine and engine cooling: exhaust system: manifold/header/muffler/tail pipe
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2020-2021 Low Floor vehicles equipped with Cummins L9 Diesel Engines. The engine calibration software's management of the injection of Diesel Exhaust Fluid can allow excessive ammonia into the tailpipe exhaust.
- Risk
- Exposure to high levels of ammonia can increase the risk of injury.
- Remedy
- Cummins will recalibrate the engine, free of charge. Owners may contact Gillig's customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 21V538000 · Recall details
Suspension: rear: axle: non-powered axle assembly
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2020-2021 Low Floor Diesel, CNG, and Battery Electric buses. The rear axle may come out of alignment during operation.
- Risk
- An improperly aligned rear axle may cause a loss of vehicle control, increasing the risk of a crash.
- Remedy
- Gillig will install a new locknut, free of charge. Owner notification letters were mailed on July 19, 2021. Owners may contact Gillig's customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 21V487000 · Recall details
Structure: body: door
- What is wrong
- Gillig, LLC (Gillig) is recalling certain 2020-2021 29, 35, 40-foot Low Floor and BRT buses powered by Compressed Natural Gas (CNG). The overlap between the curb side and street side roof doors is insufficient and may allow the street side door to accidentally open.
- Risk
- An open door may strike another vehicle or structure, increasing the risk of a crash.
- Remedy
- Dealers will install a new locking plate, overlap bracket, and mounting hardware, free of charge. Owner notification letters were mailed on May 14, 2021. Owner may contact Gillig customer service at 1‑510‑264‑5073 or 1‑800‑735‑1500.
Recall number 21V291000 · Recall details
Technical service bulletins for the 2021 Gillig Low Floor 5
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This applies to some GILLIG Allison eGen Flex Hybrids built between the years 2021 and 2024 using a...
- Gen 2.0 and 2.5 BEB PTC compartment HV battery cables may have insufficient support bracketry that could...
- Customers are being advised to purchase the low conductivity coolant used in Battery Electric Bus (BEB)...
- GEN2 and GEN2.5 BEBs w/front charger has a possible rubbing concern with Power Steering
- Bus exhibits Fault Code indicating Charging issue
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Questions about the 2021 Gillig Low Floor
Is the 2021 Gillig Low Floor reliable?
Owners have filed 0 complaints about the 2021 Gillig Low Floor.
What is the most common problem with the 2021 Gillig Low Floor?
There are not enough complaints to tell.
How many recalls does the 2021 Gillig Low Floor have?
13 recalls, covering fuel system, diesel, equipment and visibility.
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