Vehicle Registration Plates of Malaysia

Malaysian registration plates are displayed at the front and rear of all private and commercial motorized vehicles in Malaysia, as required by law. The issuing of the license plates is regulated and administered by the Malaysian Road Transport Department (Jabatan Pengangkutan Jalan Malaysia) or JPJ.

Peninsular Malaysia:
A = Perak
B = Selangor
C = Pahang
D = Kelantan
J = Johor
K = Kedah
M = Melaka
N = Negeri Sembilan 
P = Pulau Pinang
R = Perlis
T = Terengganu
W = Kuala Lumpur

Note: When WYY 9999 is reached, the algorithm will be altered again 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.

Sarawak:
QA = Kuching
QB = Sri Aman and Betong
QC = Samarahan
QL = Limbang
QM = Miri
QP = Kapit
QR = Sarikei
QS = Sibu and Mukah
QT = Bintulu

Sabah:
SA = West Coast
SB = Beaufort
SD = Lahad Datu
SG = Sabah Government
SK = Kudat
SS = Sandakan
ST = Tawau
SU = Keningau

Others:
H = Taxi
Z = Military
DC = Diplomatic Corps
CC = Consular Corps
UN = United Nation

Specials:
Proton =  Issued for certain Proton cars.
Perodua = Issued for certain Perodua cars.
WAJA = Issued for Proton Waja cars.
Chancellor = Issued for Proton Chancellor cars.
Persona = Issued for Proton Persona cars.
Satria = Issued for Proton Satria cars.
Tiara = Issued for Proton Tiara cars.
Perdana = Issued for Proton Perdana cars.
LOTUS = Issued for certain Lotus cars.
KRISS = Issued for Modenas Kriss motorcycle.
Jaguh = Issued for Modenas Jaguh motorcycle.
NAZA = Issued for certain Naza vehicles.
SUKOM = Issued only during the 1998 Commonwealth Games which was held in Kuala Lumpur that year.
BAMbee = Issued only during the 2000 Thomas and Uber Cup which was held in Kuala Lumpur that year.
XIII NAM=  Issued only during the 2003 NAM Summit which was held in Kuala Lumpur that year.
X OIC = Issued only during the 2003 OIC Summit which was held in Kuala Lumpur that year.
XI ASEAN = Issued only during the 2005 ASEAN Summit which was held in Kuala Lumpur that year.
XXX IDB = Issued to members and participants of the Islamic Development Bank conference.
G1M = Issued to symbolize the 1Malaysia concept.
IM4U = Issued in March 2013 to symbolize the 1Malaysia concept.

Please visit the below link for more information.

Ref: http://en.wikipedia.org/wiki/Vehicle_registration_plates_of_Malaysia