2015 Mitsubishi i-MiEV
NHTSA Defect Investigations
The Office of Defects Investigations (ODI) is an office within the NHTSA which investigates serious safety problems in the design, construction or performance of vehicles. The NHTSA is authorized to order manufacturers to recall and repair vehicles, if the ODI finds a safety issue. NHTSA investigations for the 2015 Mitsubishi i-MiEV, both ongoing and closed, are listed below:
INVESTIGATION: Loss of Brake Power Assist
NHTSA Defect Investigation #RQ19002
Component(s): Service Brakes
Service Brakes, Hydraulic:Power Assist:Vacuum
Summary: In 2013 and 2014, Mitsubishi conducted recalls 13V-031 (Mitsubishi SR-13-001) and 14V-522 (Mitsubishi SR-14-007) to address defect conditions that could result in an inoperable brake vacuum pump in certain model year (MY) 2012 (13V-031) or MY 2010 through 2014 (14V-522) Mitsubishi i-MiEV vehicles (subject recalls). Mitsubishi's recall submissions indicated that an inoperable brake vacuum pump may result in increased stopping distance which may increase the risk of a crash. The remedy for 13V-031 involved replacing the vacuum pump with a redesigned part. Depending on the affected vehicle, the remedy for 14V-522 involved reprogramming the EV-ECU, which controls the brake vacuum pump, replacing the brake vacuum pump with a redesigned part (if necessary), or both.From March 2018 through March 2019, the Office of Defects Investigation (ODI) received three complaints alleging loss of brake power assist due to vacuum pump failure in MY 2012 Mitsubishi i-MiEV vehicles. All three vehicles had the vacuum pumps replaced with countermeasure pumps in early-2013 under recall 13V-031 and also were subsequently remedied under 14V-522. The reported vacuum pump failures occurred approximately 5 to 6 years after the pump replacement repairs. A Recall Query has been opened to assess the failure frequency of the countermeasure vacuum pumps used as remedy parts in the subject recalls and as original equipment parts in subsequent production of Mitsubishi i-MiEV vehicles.The following VOQ numbers are associated with this opening resume:11078966, 11171175, 11187483.