AutoStatsIQ
Data through Oct 2026
Model year

2018 Proterra Catalyst

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

Recalls (9)Complaints (0)Investigations (1)Bulletins (74)
Recall campaigns covering this model year91,785 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 2018 Proterra Catalyst by year filed

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

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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.

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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 2018 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 2018 Proterra Catalyst
CampaignFiledSubjectComponentVehiclesRemedy
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
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
19V-460Jun 14, 2019Temperature and vibration stresses may cause the tempered glass roof hatch to shatterStructure21Part replacement
19V-402May 30, 2019Vehicles are equipped with swivel valves that may insufficiently protect the air brake system from an air leak between the service reservoir and…Brakes147Part replacement
19V-283Apr 9, 2019Mesh cap covering the airline for the tow fitting can be clogged with road debris in inclement weather, possibly resulting in a build up of air…Brakes39Repair or modification
19V-062Jan 30, 2019Affected vehicles are equipped with a four point height control system that may cause a load imbalance, overloading the front tiresSuspension310Not stated
19V-061Jan 29, 2019Affected vehicles lack a Graham White air brake supply reservoir, possibly resulting in long term moisture build up in the air brake systemBrakes55Repair or modification
19V-034Jan 16, 2019Certification label may list an incorrect gross front axle weight rating and/or incorrect tire pressuresEquipment184Part replacement
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2018 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

    74 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.

    • SB-18-28 Oct 5, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to upgrade the ABS controller to communicate with clever ITS ABS monitoring.
    • 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-20-015 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-20-076 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-20-085 Oct 7, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the side windows due to water ingress between window and body.
    • SC-20-097 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-20-109 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-20-127 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-20-138 May 20, 2021 · Service Bulletin/Repair Instructions
      Transit bus HVAC software upgrade to improve performance of the Eberspaecher unit.
    • 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-20-168 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-21-030 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-21-040 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-21-041 Jul 9, 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-21-048 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-21-091 Apr 21, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair at the rear door, improve the securement of the edge trim.
    • SC-21-130 Dec 7, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace mudflaps behind the rear wheels. Larger mudflaps will be installed to minimize road grime and debris from entering the rear vehicle cage, thereby offering better protection for the components in the rear of the bus.
    • SC-21-183 Jan 27, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair instructions to install a drain in the cavity where the ADA ramp sits.
    • FC-22-046 Apr 22, 2022 · Service Bulletin/Repair Instructions
      Transit bus quality check on bus bodies not produced by TPI. Inspecting the steering gear bolts to ensure torque strips are intact.
    • SC-22-003 Feb 26, 2022 · Service Bulletin/Repair Instructions
      Transit bus procedure to inspect torque strips on the steering gearbox and record breakaway values then replacing the hardware and using blue loctite to reinstall.
    • SC-21-050 Apr 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus reliability improvement for the air intake of the auxiliary heater to intake fresher air.
    • SC-22-155 Nov 7, 2022 · Service Bulletin/Repair Instructions
      Repair instructions for transit buses that are not TPI bodies to replace the gearbox fasteners with locking fasteners.
    • SC-21-010 May 12, 2022 · Service Bulletin/Repair Instructions
      Transit bus body composite repair at the rear door if any fiberglass is delaminating.
    • SC-21-054 Aug 27, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair instructions to the composite door header bracket if the door falls out of alignment.
    • FC-22-075 Jul 22, 2022 · Service Bulletin/Repair Instructions
      Fleet Check/ Repair Instructions for the heavy duty electric transit buses, checking the gap between the Vrod and suspension link bracket.
    • FC-22-157 Oct 12, 2022 · Service Bulletin/Repair Instructions
      Fleet check repair instruction for heavy duty transit buses to inspect for connector between interlock and ATC being installed in the wrong location.
    • FC-22-167 Jan 10, 2023 · Service Bulletin/Repair Instructions
      Instruction to verify the BTMS chiller panels are assembled correctly, ensuring the hinge pin is secured.
    • FC-23-003 Oct 2, 2023 · Service Bulletin/Repair Instructions
      Repair instruction to inspect heavy duty transit vehicles for humidity in the battery pack and perform preventative maintenance.
    • FC-23-006 Nov 29, 2022 · Service Bulletin/Repair Instructions
      Repair instructions for the telemetry system on the heavy duty transit buses if the system is not reporting.
    • IB-23-032 Oct 6, 2022 · Service Bulletin/Repair Instructions
      Service Bulletin for an alternative coolant temp sensor for transit buses as the original sensor installed is challenging to purchase due to supply constraints.
    • IB-23-132 Feb 20, 2024 · Service Bulletin/Repair Instructions
      Repair instructions to support transit buses when a charge shunt fails. If the installed charge shunt were to fail we can replace with the original shunt installed, therefore this instruction set provides documentation for installing an alternative.
    • SC-22-026 Jul 6, 2023 · Service Bulletin/Repair Instructions
      Service Bulletin for upgraded battery fans on select heavy duty electric buses. Moving to brushless fans to extend the service life of the fans.
    • SC-22-097 Oct 22, 2022 · Service Bulletin/Repair Instructions
      Repair instructions for ADA ramp brackets that have come debonded due to water intrusion.
    • SC-22-104 Nov 28, 2022 · Service Bulletin/Repair Instructions
      Instructions to add spacers to the aux heat tank to reduce stress acted on.
    • SC-22-150 Apr 4, 2023 · Service Bulletin/Repair Instructions
      Bulletin to add shim under the steering TLP due to build variances of the bodies and bond gaps.
    • SC-23-147 Aug 24, 2024 · Service Bulletin/Repair Instructions
      The procedure describes the process of updating the body controller to remove a 2.5 second delay to a door open request.
    • SC-20-025 Sep 23, 2020 · Service Bulletin/Repair Instructions
      This procedure is a updates the rooftop battery thermal management system unit brackets to a more robust design.
    • SC-20-079 Aug 6, 2020 · Service Bulletin/Repair Instructions
      This retrofit changes the traction motor inverter enable signal from 12 to 24 volts to improve reliability.
    • SC-20-084 Jul 10, 2020 · Service Bulletin/Repair Instructions
      This retrofit removes an unnecessary bleed line in the coolant system that may lead to air entrapment and reduced efficiency of the cooling system.
    • SC-20-083 Jul 10, 2020 · Service Bulletin/Repair Instructions
      This retrofit removes an unnecessary bleed line in the coolant system that may lead to air entrapment and reduced efficiency of the cooling system.
    • SC-20-074 Jul 10, 2020 · Service Bulletin/Repair Instructions
      This retrofit adds reflective tape to the front of the bus to comply with California state regulations.
    • SC-19-62 Apr 28, 2020 · Service Bulletin/Repair Instructions
      This procedure upgrades the rear flip up seat mount to a more robust design.
    • SC-19-133 Nov 15, 2019 · Service Bulletin/Repair Instructions
      This campaign updates the Grayson battery thermal management system to the latest version for improved performance.
    • SC-19-102 Aug 16, 2019 · Service Bulletin/Repair Instructions
      This retrofit removes the 5-Position door switch and replaces it with individual front and rear door switches.
    • SC-19-97 Aug 14, 2019 · Service Bulletin/Repair Instructions
      The reason for this software update is to update various controllers. All the included Proterra Catalyst E2 vehicles require a change to the software/configuration for the following items: Battery Pack Software, Charge Controller, ESM Software, Powertrain C…
    • SC-19-95 Aug 13, 2019 · Service Bulletin/Repair Instructions
      The reason for this software update is to update various controllers. All the included Proterra Catalyst E2 vehicles require a change to the software/configuration for the following items: Battery Pack Software, Charge Controller, ESM Software, Powertrain C…
    • SB-19-87 Aug 14, 2019 · Service Bulletin/Repair Instructions
      This retrofit installs a resistor in parallel with the ADA Alarm to prevent it from sounding when the ADA Ramp is not deployed.
    • SC-19-84 Jul 10, 2019 · Service Bulletin/Repair Instructions
      Pin placement in the dash DMUXK connector was incorrect and caused the ICAN network to be improperly terminated. Proterra issued this service bulletin to relocate the pin to properly terminate the ICAN network.
    • SC-19-82 Jul 3, 2019 · Service Bulletin/Repair Instructions
      A software error was causing a false state of charge calculation, shutting off the DC to DC converter, causing the low voltage batteries to lose charge. Loss of power to the low voltage battery could cause ancillary systems in the vehicle to turn off. Prote…
    • SC-19-72 Jul 10, 2019 · Service Bulletin/Repair Instructions
      The brackets and latches on 40ft Catalyst buses holding the lid on the clamshell covering rooftop components can come loose, possibly causing the lid to open. An open lid on a moving vehicle could become damaged or in an extreme case disconnected, possibly …
    • SC-19-58 Jul 11, 2019 · Service Bulletin/Repair Instructions
      Voltage sags are causing the datalogger to reset, losing data used for monitoring and servicing the vehicles. Proterra issued this service bulletin to add a diode that will prevent voltage sags and loss of data.
    • SB-19-32 Jul 17, 2019 · Service Bulletin/Repair Instructions
      The brackets and latches holding the lid on the 35ft Catalyst E2 clamshell covering rooftop components can come loose, possibly causing the lid to open. An open lid on a moving vehicle could become damaged or in an extreme case disconnected, possibly causin…
    • SB-19-02 Jul 3, 2019 · Service Bulletin/Repair Instructions
      Due to a wiring harness change, the cord grip on the power steering motor is the wrong size, which could allow water to leak into the motor wiring junction box, causing the power steering motor to stop working. Proterra issued this service bulletin to repla…
    • SC-19-69 Jun 12, 2019 · Service Bulletin/Repair Instructions
      This procedure changes the wiring for the radiator for improved reliability.
    Source: NHTSA manufacturer communications files.
    About service bulletins