2025+ RAM Dual Alternator Incompatibility

Technical Support Subject 2025+ RAM Dual Alternator Incompatibility Version Document Department Revision Details Author Reviewed by Implemented Tech. Eng. B EXT-UH-020 Tech Applications BDJ BDJ KRM 20 May 2026 Page 1 of 1 Knowledge Base: http://kb.vmacair.com/ Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Sales:1(800)738-8622 Fax: 1(877)740-3201 SYSTEM OR PARTS AFFECTED UNDERHOOD® air compressor systems for model year 2025+ RAM trucks OVERVIEW Installing an UNDERHOOD air compressor system in a vehicle originally equipped with dual alternators is considered “out of application” and will void the VMAC warranty. • UNDERHOOD air compressor systems are not compatible with vehicles equipped with dual alternators. • While the removal of the secondary alternator is physically possible, doing so will negatively impact charging system performance and will cause the vehicle to display error codes. • RAM dealers are unlikely to reprogram the vehicle to disable the secondary alternator.