Two problems related to seat broken have been reported for the 2007 Infiniti M45. The most recently reported issues are listed below.
The drivers side bottom metal seat bracket broke while in motion. The seat is now completely unsupported. The seat moves when brakes are applied.
River's seat collapsed and came off tracks while car was being driven. Defective welds (as stated by Infiniti certified dealer service center) holding seat assembly determined to be cause. Infiniti diagnosis; seat track broken. Requiring replacement of front adjuster assembly; part # 87450-eh00a. Cost of part $~1000 to install; $~300. This is a Nissan/Infiniti problem reported previously to NHTSA on numerous occasions. Dealer service department stats that weld failure causes seat to collapse. Problem is longstanding, well documented, and known to Infiniti. In spite of this, no remediation, other than repair at owner's expense, has been offered by Infiniti. This weld failure is a serious safety related matter that is not the result of abuse, maintenance neglect, or overstress to seat or seat assembly. The has been acknowledged by repair personnel at dealership that carried out the repair.
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