NHTSA complaint #11767973

Owner complaint summary

VIN: [XXX]: 2024 Acura MDXComponents: Engine, Electrical System, Powertrain (Auto Idle-Stop)Ref Investigation: NHTSA EA25-004 (Upgraded from PE22-005) Dealer: Acura Carland ([XXX])SAFETY DEFECT SUMMARY:Severe safety hazard involving the Auto Idle-Stop system. The vehicle repeatedly shuts off at stops (intersections, traffic lights) and fails or struggles to restart, leaving it stranded with zero motive power in active traffic and creating immediate collision risk. DEALER FAILURE & PROTOCOL DEVIATION:Under warranty, Acura Carland diagnosed excessive starter electrical draw and replaced the starter motor. This was a superficial fix. Per Honda/Acura technical directives (e.g., TSB 23-009 / NHTSA [XXX] and [XXX]), high starter current draw during idle-stop restart stems from root mechanical drag (valve clearances) and faulty relays. Replacing only the starter ignored the root cause, leading directly to repeat failure.The identical failure recurred. Upon returning to Acura Carland, dealership personnel dismissed my concerns, disregarded published technical notices and federal investigation references, and refused to escalate to Honda Technical Information & Support (TIS) or a Field Technical Specialist.NHTSA EA25-004 NEXUS:Directly matches active investigation EA25-004 (2.2M Honda/Acura 3.5L vehicles). ODI specifically noted restart failures persist even after software updates and starter motor replacements. My vehicle demonstrates that 2024 MDX models suffer the identical vulnerability and dealers are performing inadequate component swaps. RELIEF REQUESTED:Incorporate VIN [XXX] into EA25-004.Mandate American Honda enforce root-cause dealer repair protocols (valve adjustments, starter relays).Compel a safety recall and full warranty extension covering all Auto Idle-Stop, ignition, valve train, and starter components. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)