The 4.0L engine with a 4th digit VIN B offers a reliable used engine option with a naturally aspirated design that ensures steady, uncomplicated power output. Its electronic multi-port fuel injection system enables efficient fuel management, making it a dependable choice for those prioritizing fuel economy alongside performance. The V6 cylinder configuration provides balanced performance, while the single overhead camshaft (SOHC) design makes it simpler to maintain. For drivers seeking a used engine with minimal complexity and solid dependability, this 4.0L engine is a fitting choice.