W 1 was the first registration plate of Kuala Lumpur in 1974. Once W 9999 was achieved, an alphabetical sequence was added to the right of the state prefix; WA 1 was the result. When WA 9999 was reached, the number sequence was reset and the alphabetical sequence progressed; WB 1 being the outcome. After WY 9999 was achieved, a second alphabetical sequence was added to the right of the first alphabetical sequence; WAA 1 being the outcome. When WAY 9999 was reached, the second alphabetical sequence was reset and the first alphabetical sequence progressed; making WBA 1.
On September 26, 2013, WYY 9999 is reached and the algorithm is altered to feature the first alphabetical sequence behind the number sequence, resulting in W 1 A. When W 9999 Y is achieved, the second alphabetical sequence will re-emerge between the state prefix and number sequence, leading to WA 1 A. When WA 9999 Y is met, the first alphabetical sequence will reset and the second alphabetical sequence will advance, giving WB 1 A. When WY 9999 Y is reached, a third new alphabetical sequence will be spliced into the algorithm, between the second alphabetical sequence and number sequence, resulting in WAA 9999 A. The series will end when WYY 9999 Y is reached.
