AutoStatsIQ
Data through Oct 2026
Model year

2021 MCI J4500

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

Recalls (5)Complaints (0)Investigations (0)Bulletins (18)
Recall campaigns covering this model year520k 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 2021 MCI J4500 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

5 recall campaigns cover the 2021 MCI J4500

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 2021 MCI J4500
CampaignFiledSubjectComponentVehiclesRemedy
25V-853Dec 10, 2025Front door lower curb view glazing material is incorrectStructure15,454Part replacement
23V-240Apr 5, 2023Vehicle's rear lighting may be obstructed when bikes are installed on the bike rackEquipment140Not stated
21V-971Dec 15, 2021Fuel tubes between the fuel rail and the injectors for cylinders four, five, and six may fatigue and crack, which can result in a high pressure…Fuel system1,125Repair or modification
21V-748Sep 24, 2021Main Distribution Panel (MDP) located within the battery compartment contains a circuit board that may failElectrical system2,455Repair or modification
21V-063Feb 10, 2021Power cables may have been improperly installed and routed in the vehicle battery compartment, which may result in chafingElectrical system1,229Inspection
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2021 MCI J4500

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

    NHTSA has not opened an investigation on this model year

    Source: NHTSA ODI investigations file.
    All investigations
    Service bulletins

    18 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

    • ITS61263 Aug 28, 2026 · Service Bulletin/Repair Instructions
      ITS to replace the neck fill assembly with a new design which resolves a possible splashback issue at higher fuel flow rates, without the need for fuel tank removal.
    • TSIB 26-07 Aug 11, 2026 · Service Bulletin/Repair Instructions
      This bulletin is to provide instructions for clearing DTC 1067 FMI 7 (Pressure Sensor Not Calibrated) and FMI 11 (Primary and Secondary Circuit Pressure Sensor (PS1/PS2) Plausibility Error - BS Pressure), when required to prevent the loss of Adaptive Cruis…
    • TSIB 26-05 Jun 11, 2026 · Service Bulletin/Repair Instructions
      This bulletin introduces an optional product improvement to the A/C compressor drive system for coaches equipped with a Cummins X12. The improved pulley system is available for customers who wish to reduce noise and vibration characteristics and may be inst…
    • TSIB 26-01 May 6, 2026 · Service Bulletin/Repair Instructions
      This TSIB provides information to provide a software update. Some coaches using MCC HVAC Eco-Tempo ECU # 07-10-009 software T35-1581 / V1.04 may be experiencing random fault codes due to MCC software errors.
    • ITS61078 Mar 20, 2026 · Service Bulletin/Repair Instructions
      Instructions to remove DEF sensor bypass calibration from engine ECM and new sensor installation AR - 22inch DEF tank
    • TSIB 26-04 Feb 9, 2026 · Service Bulletin/Repair Instructions
      This TSIB is to inform customers the recommended steering axle cleaning/greasing instructions to prevent damage on axle components due to displacement of grease from the bearings, lubrication reduction and accelerate wear for coaches with independent front …
    • ITS61475 Oct 1, 2025 · Service Bulletin/Repair Instructions
      Instructions to download BCC program (T35-1581) V4.06. This program will allow the Eco-Temp system to properly log A17 code for low suction pressure.
    • ITS61345 Jun 10, 2025 · Service Bulletin/Repair Instructions
      The mini fuses in the battery compartment for the condenser may not be enough for certain load conditions.
    • TSIB 24-03 Nov 5, 2024 · Service Bulletin/Repair Instructions
      Information to owners showing the proper procedure for checking the oil level in a BITZER HVAC compressor.
    • TSIB 22-04 Jul 18, 2023 · Service Bulletin/Repair Instructions
      Instructions to improve sealing in the front junction box.
    • TSIB 22-12 Sep 7, 2022 · Service Bulletin/Repair Instructions
      MCI has released Technical Service Information Bulletin (TSIB) 22-12 to address concerns with water ingress in remote switch box. The TSIB provides guidance on how to rework the box to inhibit water intrusion and connector corrosion
    • TSIB 22-04 May 3, 2022 · Service Bulletin/Repair Instructions
      Technical Service Information Bulletin describing the retrofit for the front junction box cover on specifically equipped buses.
    • TSIB 22-02 Apr 1, 2022 · Service Bulletin/Repair Instructions
      This Technical Service Information Bulletin is a supplemental reminder to all MCI owners/operators of vehicles which are affected by the Cummins Equipment Recall 21E-099 and MCI Vehicle recall 21V-971.
    • TSIB 21-10 Jan 5, 2022 · Service Bulletin/Repair Instructions
      This Technical Service Information Bulletin describes interim inspection procedures required every 6000 miles on specific motor coaches due to the global parts shortage and subsequent delay in available parts to conduct the corrective actions associated wit…
    • TSIB 21-08 Oct 6, 2021 · Service Bulletin/Repair Instructions
      Technical Service Information Bulletin describing an update to the Preventaive Maintenance requirements for specifically equipped motor coaches with Kiel Avane model passenger seats.
    • TSIB 21-05 Jun 2, 2021 · Service Bulletin/Repair Instructions
      This Technical Sevice Information Bulletion is to advise of a part number supersession of the coolant hump hose, MCI PN 6L-8-353, to MCI PN 06-08-2262.
    • SB 3146 Oct 22, 2020 · Service Bulletin/Repair Instructions
      This service bulletin outlines the steps to add the secondary air filter. The secondary filter can only be used with primary air filter, MCI P/N: 09-03-1858.
    • SB 485 Sep 17, 2020 · Service Bulletin/Repair Instructions
      This Service Bulletin informs affected owners that the A/C compressor on certain J4500 coaches are making excessive noise and vibration which may result in vibration transferred to the coach frame, possibly resulting in noise and passenger discomfort and th…
    Source: NHTSA manufacturer communications files.
    About service bulletins