More than 21 million people are eligible to cast their votes in the 15th general election, with analysts seeing no clear frontrunner among four coalitions seeking 222 parliamentary seats at stake.
Voting has opened in Malaysia's 15th general elections that will decide if a long-ruling coalition can make a comeback.
About 21 million registered voters are expected to head to polling centres across the Southeast Asian nation throughout Saturday, amid fears heavy monsoon rains could disrupt voting in certain areas.
Jailed ex-leader Najib Razak's graft-tainted party is seeking to cement its grip on power in the election, but analysts say the race is too close to call.
Najib's United Malays National Organisation (UMNO) usually dominates politics in the Southeast Asian country but suffered a major defeat in the 2018 general election after a massive corruption scandal at state fund 1MDB.
The two governments that succeeded UMNO, however, were plagued by infighting, allowing the party to creep back into power last year. Now, UMNO will be seeking a stronger mandate in an election called ten months ahead of schedule.
Among the challengers is perennial opposition leader Anwar Ibrahim, 75, who leads the ethnically-diverse Pakatan Harapan (Alliance of Hope) coalition. He is campaigning on an anti-corruption platform.
With age catching up, this election could be Anwar's last chance to fulfill a 20-year dream to lead Southeast Asia's third-largest economy.
He is up against the ruling Barisan National coalition, which is dominated by UMNO and led by Najib loyalist and ex-interior minister Ahmad Zahid Hamidi. It also includes caretaker prime minister Ismail Sabri Yaakob.
UMNO remains hobbled by corruption allegations. Najib, who was at the centre of the 1MDB scandal, is currently serving a 12-year jail term.
Opposition parties say they are concerned the ex-PM could walk free and corruption charges against Zahid and other party leaders could be dropped if UMNO wins.
Former prime minister Mahathir Mohamad, 97, and another ex-leader Muhyiddin Yassin, 75, head two other coalitions contesting the elections.
No clear frontrunner
Analysts said there was no clear frontrunner among the four coalitions seeking the 222 parliamentary seats at stake.
Malaysians will choose from a record 945 candidates across the largely Muslim nation, which also includes the states of Sabah and Sarawak on Borneo island.
"Voters can expect a plethora of candidates on their ballot papers such that they will have a hard time deciding between candidates with similar positions," said Oh Ei Sun of the Pacific Research Center of Malaysia.
The number of eligible voters has risen from 18 million four years ago to more than 21 million after the voting age was lowered in 2021.
About 1.4 million of the new additions are first-time voters aged between 18 and 20.
The majority of voters live in rural areas, where patronage politics continues to hold sway.
Price hikes and floods
Analysts said the multi-racial country would be in for further political instability if no coalition wins a clear majority.
"Unless Pakatan Harapan can clinch an outright parliamentary majority... the dominant UMNO party or one of the Malay Muslim parties would get to form a coalition government," Oh told the AFP news agency.
"Voters are likely to look forward to a similarly fragmented political landscape after the election, with a lot of horse-trading to form the next ruling coalition."
The election comes as Malaysians face soaring food prices, and parts of the country continue to be battered by flash floods due to monsoon rains.