Keeping Prime Minister Najib Abdul Razak in power or the Bantuan Rakyat 1Malaysia (BR1M) were not reasons to vote for BN, said about half of the youths polled in Sungai Besar.
A total 47.4 percent answered 'no' when asked if BN should be retained in Sungai Besar because of Najib's leadership.
Similarly, 44.7 percent replied in the negative when asked if BN should win in Sungai Besar because "BN gave BR1M to defend the people".
This is according to a survey done by research house Institut Darul Ehsan (IDE) on 522 voters, of which 190 are aged 21 to 40.
"Respondents largely felt that subsidies should not be politicised and is a responsibility of any national leader.
"Various negative issues involving Najib also affected youth perspective and eroded Umno's credibility in their eyes," IDE said in a statement.
IDE is a Selangor-government funded institute.
However, the results also showed that BN has support from at least a third of the respondents.
A total 30 percent said BN should win in Sungai Besar because of Najib while 37.4 percent stated that BN should succeed because of BR1M.
The remainder of those surveyed were unsure if Najib or BR1M are reasons why BN should win in Sungai Besar.
IDE said of the youths surveyed, 41.1 percent support BN, 47.9 percent support Pakatan Harapan while 11.1 percent do not support any party.
BN's Budiman Mohd Zohdi faces PAS' Dr Rani Osman and Parti Amanah Negara's Azhar Abdul Shukur at the polls on Saturday.
The parliamentary constituency was won by BN's Noriah Kasnon with less than one percent of total votes in the last general election.
Noriah died in a helicopter crash in Sebuyau, Sarawak on May 5, while campaigning in the state polls.