Mazda 6 expensive battery replacement issue for the eLoop system on Mazda 6

Some Mazda 6 owners with the i-Eloop system report experiencing significant challenges related to the high cost of battery replacement, with quotes ranging from $400 to $750, which is much higher than standard battery replacements. Additionally, some drivers have encountered warning messages such as "Battery Management System malfunction," indicating potential issues that may necessitate a battery replacement. While some owners have successfully replaced the original battery with non-OEM alternatives to reduce costs, they often face risks like errors or compatibility issues. Despite the steep price, others have tried cheaper options, such as a $90 battery from AutoZone, yielding mixed results. Furthermore, there are ongoing discussions among Mazda 6 owners regarding the disconnection of the current sensor linked to the i-Eloop feature during battery replacement, with many seeking specific guidance on this procedure. These concerns underscore the complexities and considerations surrounding battery replacement for the i-Eloop system in Mazda 6 vehicles.