In 2003, for the 2004 model year, the GX 470's transmission was upgraded to a sealed unit with no dipstick. An optional Kinetic Dynamic Suspension System (KDSS) became available as a late-year addition. KDSS freed and adjusted the vehicle's stabilizer bars for greater articulation allowing the wheels to move with less restriction over uneven terrain, and used front and rear hydraulic pressure-sensing valves and larger stabilizer bars to reduce body roll during on-road conditions. Safety upgrades for 2004 included a roll-sensing feature for the side curtain airbags, a tire pressure monitoring system, and an optional rear backup camera system.