Symmetrical All Wheel Drive (SAWD) is a full-time four-wheel drive system developed by Subaru. It is a standard feature on all Subaru models and comprises a longitudinally mounted Horizontally-Opposed Subaru Boxer engine and a symmetrically designed 4WD transmission. Here are some key features of SAWD:

• Sends power to all wheels simultaneously for maximum traction and acceleration.
• Provides an even distribution of power for maximum traction, which is especially useful in slippery conditions.
• Improves stability and provides a quicker response to wet roads.
• Uses several core technologies, including Vehicle Dynamics Control (VDC), Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), and Brake Assist, for the most effective response to slippery conditions.
• Reduces the chances of slipping in the first place, making it a much safer option.
• Is more efficient than normal All-Wheel Drive systems, allowing the vehicle to last longer.

SAWD is different from other All Wheel Drive (AWD) systems because it sends power to all four wheels continuously, whereas in other AWD systems, this only happens after the vehicle senses slippage and may not be able to react in time. SAWD is also more efficient than normal AWD systems, using fewer components and losing less power due to friction.