If you’re searching for a KIA Optima Automatic Transmission 2.4 L Petrol (G4KJ) that delivers reliable performance, seamless gear engagement, and long-lasting durability, this OEM-compatible automatic transmission assembly is engineered to match the precise drivetrain characteristics of the Optima’s 2.4 L petrol powertrain.

Designed to integrate perfectly with the 2.4 L G4KJ engine and its torque profile, this automatic transmission assembly supports optimised shift logic and hydraulic mapping for smooth acceleration, efficient power delivery, and consistent drivability in everyday traffic, highway cruising, or load-carrying conditions. The transmission’s internal control systems and fluid regulation strategy are calibrated to work in harmony with the engine’s output curve, ensuring consistent fuel economy and responsive throttle behaviour across a range of driving environments.

This automatic transmission is ideal for owners seeking a complete replacement transmission solution for the KIA Optima 2.4 L Petrol G4KJ, whether restoring original performance after wear or addressing symptoms such as delayed gear response, harsh shifting, slipping under load, or transmission-related warning indicators. As with all precision drivetrain components, confirming correct fitment, hybrid communication compatibility (if applicable), and matching to the exact OEM specifications before purchase is essential to prevent vehicle fault codes, unpredictable shift behavior, or premature component wear.

Because modern automatic transmissions rely on finely tuned hydraulic controls and electronic coordination with engine management modules, choosing a unit that’s designed to match the Optima’s G4KJ engine ensures accurate communication between the transmission control unit (TCU) and the engine control module (ECM). This synchronization enhances shift smoothness, improves throttle response, and helps maintain efficiency and performance mile after mile.

Before buying, always verify the vehicle’s model year, engine code, and transmission configuration to ensure a precise match for your KIA Optima Automatic Transmission 2.4 L Petrol G4KJ application — helping protect your drivetrain integrity and restore dependable performance you can trust.