Vehicle report

2026 MCI D4520

Compare every MCI D4520 yearNHTSA and EPA records

Service bulletins

4 bulletins

Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.

ITS61822

Service Bulletin/Repair Instructions

Instructions to verify compression fitting P/N 19-10-1335 is installed correctly.

TSIB 26-07

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 Cruise Control functionality and the illumination of a warning indicator.

TSIB 26-05

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 installed at the customer’s discretion.

ITS61738

Service Bulletin/Repair Instructions

Instructions for installing updated software to allow the PLC system to "sleep".

Reading this report

Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.