AutoStatsIQ
Data through Oct 2026
Model year

2019 Proterra Catalyst

Body and fuel not decoded. Owner complaints on file from no date to no date.

Recalls (9)Complaints (0)Investigations (1)Bulletins (146)
Recall campaigns covering this model year91,931 vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2019 Proterra Catalyst by year filed

Owner complaints about this model year, by the year they were filed with NHTSA.

No campaigns match these filters.Reset filters
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

Complaints by component

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

No campaigns match these filters.Reset filters
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

9 recall campaigns cover the 2019 Proterra Catalyst

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2019 Proterra Catalyst
CampaignFiledSubjectComponentVehiclesRemedy
24V-655Sep 6, 2024Vehicle controller software may allow the electrical circuit for the radiator fan to overheatElectrical system483Software update
23V-697Oct 17, 2023Transistor inside the inverter may overheat and fail, which can result in a loss of power steering and drive powerElectrical system238Part replacement
22V-887Nov 30, 2022One or more battery packs may allow liquid to leak into and accumulate in the battery pack enclosureElectrical system300Software update
22V-114Feb 28, 2022Plexus adhesive between the torque limiter plate and the bus body may be insufficient, causing the bolts that secure the steering gearbox to loosenSteering724Repair or modification
21V-268Apr 19, 2021Software defect in the body controller that operates the door motor may allow the rear door to open unexpectedlyElectrical system12Software update
20V-664Oct 28, 2020Lack of plexus adhesive between the torque plate and the vehicle chassis may cause the bolts securing the steering gear box to loosenSteering5Repair or modification
20V-621Oct 7, 2020Power steering hose located at the pump and reservoir may leak and sweat fluid through the hoseSteering8Part replacement
19V-871Dec 9, 2019Body controller software update may have disabled the audible and visible warnings that notifies the operator that the brake interlock could be…Electrical system140Software update
19V-460Jun 14, 2019Temperature and vibration stresses may cause the tempered glass roof hatch to shatterStructure21Part replacement
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2019 Proterra Catalyst

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

0 complaints on file.

    Source: NHTSA ODI complaints file.
    Investigations

    1 NHTSA investigation on file

    • RQ25001 Recall query, Electrical system
      Remedy Effectiveness of Recall 22V887
      Opened Jun 27, 2025, still open
    Source: NHTSA ODI investigations file.
    All investigations
    Service bulletins

    146 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.

    • SC-21-162 Dec 21, 2021 · Service Bulletin/Repair Instructions
      Pin location change on an ECU to properly assign both doors open signal and the horn relay signal.
    • SC-19-123 Jan 2, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to the HVAC provided by the vendor due to the ability to heat with no cabin fan which results in the heater safety switch faulting.
    • SC-19-124 Oct 22, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to modify the plumbing of the hill hold solenoid to see slightly more pressure.
    • SC-19-161 Mar 17, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to reduce or eliminate power steering noise on the 35' buses.
    • SC-20-001 Feb 12, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the coolant reservoir to prevent damage to the expansion tanks on the roof.
    • SC-20-011 Jan 17, 2020 · Service Bulletin/Repair Instructions
      Transit bus software upgrade to the body, vehicle and dash controllers to improve diagnostic fault handling, remove unused parameters to simplify EEPROMs.
    • SC-20-014 Jul 28, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the aux heater drain plug for sizing and material appears the bill of materials called out the wrong size drain plug.
    • SC-20-015 Mar 8, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the defroster unit to add an additional temp sensor to have a back up for temperature controls.
    • SC-20-034 Oct 6, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the ADA ramp as the ramp was not deploying to ground level.
    • SC-20-035 Oct 4, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace a fitting on the fire suppression system that has potential to chaff against aux heat components.
    • SC-20-064 Oct 13, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the aux heat convectors to secure wiring harness, it was found the previous adhesive material used would debond when heated.
    • SC-20-076 Nov 1, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to the electrical cabinet behind the drivers area. This bulletin updates the bracketry to be more robust in this area.
    • SC-20-081 Oct 15, 2020 · Service Bulletin/Repair Instructions
      Transit bus rear interlock solenoid retrofit to install sealed solenoid to reduce damage from road grime.
    • SC-20-082 Oct 22, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the defroster ducting hoses, adds fasteners to prevent ducting from slipping off.
    • SC-20-085 Oct 7, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the side windows due to water ingress between window and body.
    • SC-20-092 Jul 1, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to the HVAC VFD Inverter, software patch to reduce the max operation to prevent overcurrent faults.
    • SC-20-097 Jun 22, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair for the gas struts on the wheel well box to no locking struts. The locking struts to the wheel well compartment were failing due to user error and not unlocking the strut prior to closing the compartment..
    • SC-20-102 Jun 23, 2021 · Service Bulletin/Repair Instructions
      Transit bus retrofit to supply constant power to the telemetry device to improve data collection and reliability.
    • SC-20-109 Apr 28, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the exterior compartment panels to include a larger latch catch to support tolerance difference.
    • SC-20-126 Feb 12, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace the pressure switch with a sealed version to prevent unintended shifts to neutral.
    • SC-20-127 Mar 9, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the air dryer governor switch due to the original not performing as well with the environmental expose.
    • SC-21-130 Jul 29, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace the 5 position door switch with a more robust door selector switch.
    • SC-21-037 Jul 24, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to relocate the front interlock muffler to prevent road grime from clogging the vent.
    • SC-20-138 May 20, 2021 · Service Bulletin/Repair Instructions
      Transit bus HVAC software upgrade to improve performance of the Eberspaecher unit.
    • SC-20-140 Jun 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair for the rear door VIP sensors. This repair provides a clip to go behind the sensor to keep it from falling down.
    • SC-20-145 Jul 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the exterior compartment for the LV batteries. The hatch gas strut brackets were only bonded in place therefore with the new brackets they use hardware to secure. Additionally longer gas struts are provided to help service the LV batte…
    • SC-20-147 Oct 21, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to support the quarterly cadence of software upgrades. This release updates a timer to the drivers seat to reduce false alarms of no driver in the seat over bouncy roads, mapped new output for horn relay. For the vehicle controll…
    • SC-20-148 Sep 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus steering column maintenance document to supplement maintenance and repair manual.
    • SC-20-150 Jan 11, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the compartment hatches over each of the wheel wells. The gas strut mounts for the hatches are now fastened with hardware to prevent debonding of the brackets.
    • SC-20-155 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to a coolant line under the rear hatch. New part in document is a molded hose to prevent hose from chaffing on the rear hatch.
    • SC-20-159 Mar 11, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the side windows to include a larger sealing gasket to prevent water from entering cabin.
    • SC-20-162 Jun 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the aux heat coolant tubes that run under the rear door have seen corrosion. The repair instruction requires accessing a metal plate under the fiberglass and pulling out the old tubes and installing tubes with oxidation protective meas…
    • SC-20-163 Nov 23, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to increase regen in default drive and low modes to promote efficient driving. Recalibrating acceleration limiting to better achieve acceleration targets.
    • SC-20-164 Dec 17, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to the drivetrain controller. Revised controls for start up procedure, revised transmission oil pump speed for cold starts and resolved some other bugs.
    • SC-20-165 Jun 3, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to support adding drains to an internal cavity of the bus body to prevent water accumulation.
    • SC-20-168 Dec 22, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair instruction for the charge blade on the roof of the bus to supplement the repair manual to ensure connections have not come loose.
    • SC-20-174 Nov 30, 2021 · Service Bulletin/Repair Instructions
      Transit bus to the vehicles electrical and software due to the odometer losing mileage.
    • SC-21-001 Nov 12, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the wheel well compartment hinge. The compartment lid was previously bonded on, this repair instructions updates the vehicle to use fasteners as well.
    • SC-21-002 Jan 27, 2021 · Service Bulletin/Repair Instructions
      Transit bus hvac software update as the vendor found a bug inwhich the heater could run with out running the fan tripping the heating safety switch fault.
    • SC-21-008 Feb 19, 2021 · Service Bulletin/Repair Instructions
      Transit bus drive axle retrofit to replace a lock washer on the transmission.
    • SC-21-020 Feb 16, 2021 · Service Bulletin/Repair Instructions
      Transit vehicle software update to the body controller and vehicle controller. Improving visibility on the dash to LV battery voltage and ABS on the dash will flash when active.
    • SC-21-021 Jun 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus retrofit to upgrade parking brake release tank to 2.5 gallons.
    • SC-21-030 May 10, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair in the HVJB if excess heat is seen on the output for the BTMS heater.
    • SC-21-034 Sep 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the air compressor, the previous banjo fitting was prone to leaking, the solid drain plug prevents compressor from losing oil.
    • SC-21-035 Mar 29, 2021 · Service Bulletin/Repair Instructions
      Transit bus door software update from door manufacturer to fix bugs.
    • SC-21-037 Mar 19, 2021 · Service Bulletin/Repair Instructions
      Transit bus door software update from door manufacturer to fix bugs.
    • SC-21-039 Sep 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the heated mat at the rear door of the vehicle to resolve sealing and securement issues.
    • SC-21-040 Jul 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the coolant system in which a bleed line is potentially allow for aeration of the coolant. Procedure caps off this line.
    • SC-21-042 Jun 24, 2022 · Service Bulletin/Repair Instructions
      Transit bus update to the air in take of the air compressor to support the compressor getting clean air into the unit to increase reliability.
    • SC-21-045 Mar 18, 2021 · Service Bulletin/Repair Instructions
      Transit bus torque verification on the intermediate steering shaft.
    • SC-21-047 Mar 23, 2021 · Service Bulletin/Repair Instructions
      Transit bus front and rear door software update provided from the door vendor.
    • SC-21-048 Aug 30, 2021 · Service Bulletin/Repair Instructions
      Transit bus fleet check to inspect the steering gearboxes and replace hardware.
    • SC-21-056 May 20, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the HVAC, the supply air temperature sensor is being replaced to improved sealed sensor provided by our HVAC OEM. The sensor failure prevents the HVAC from running.
    • SC-21-060 Sep 9, 2021 · Service Bulletin/Repair Instructions
      Transit bus rear axle cover bolt replacement. The hardware originally installed had the wrong coating for the harness road grim.
    • SC-21-075 May 20, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to HV roof pantograph charging cables. The HV lugs that are bolted to the pantograph rail must be fully sealed to prevent water ingress.
    • SC-21-077 Jun 4, 2021 · Service Bulletin/Repair Instructions
      Transit bus software update to the batteries, charge controller and vehicle controller. Fixes coolant level LEDs, ESM updated specific parameters around temperatures and auto pack configuration, BMS SW resolves brick imbalance, min/max humidity levels.
    • SC-21-082 Feb 27, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to horn, the horn relay is retrofitted in this document with a improved relay design.
    • SC-21-088 Jul 23, 2021 · Service Bulletin/Repair Instructions
      Transit bus software update to the body controller, to update the controls to have the overhead lighting turn off after the doors close to reduce glare.
    • SC-21-090 May 12, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to stanchion floor mount to better dampen the stanchion system.
    • SC-21-091 Apr 21, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair at the rear door, improve the securement of the edge trim.
    Source: NHTSA manufacturer communications files.
    About service bulletins