Genuine OEM Hyundai Oil Dipstick O-Ring, part number 2661533000. This O-ring is a vital component that creates a tight seal around the engine oil dipstick, preventing oil leaks from the dipstick tube and keeping contaminants out of the engine. It is positioned at the base of the oil dipstick or within its guide tube. Weighing approximately 0.00046 kg, this small seal is crucial for maintaining engine integrity. Using a genuine OEM O-ring ensures the correct material and precise dimensions for a durable, leak-free seal, protecting the engine from external elements and maintaining proper oil levels.