SMART-O - The Intelligent Drain Plug SMART-O is a safer and more effective oil drain plug (sump plug), engineered to reduce the risk of damage to the oil pan, engine damage, and water pollution. The plug uses an innovative, patented sealing and locking mechanism that enables the plug to resist vibration and seals more effectively. Our range of 18 different plugs cover 99% of vehicles sold in the market. Dealer packs of 5 plugs or packs of 20 washers are available for each individual part number to replenish Dealer and Workshop Cases. Gauge tool to measure an OE or existing plug and then establish the equivalent SMART-O plug which fits and can be used instead the old plugs. Watch a 1min Video >