There is no credible evidence in the provided sources to confirm that hundreds of GOP registered voters switched to the Democratic Party within 48 hours following a 'Trump Hyundai scandal.'
After the Trump Hyundai scandal hundreds of GOP registered voters switched to Democratic Party in 48 hours.

Voters switch lopsidedly to GOP, in warning for Dems - AP News
Source: apnews.com
Key Evidence
details a Hyundai factory immigration raid unrelated to voter behavior.
timesofindia.indiatimes.comtimesofindia.indiatimes.comUS vs Seoul? Hundreds of South Koreans detained after Trump admin crackdown at...
documents party affiliation changes after the Capitol riot but not linked to Hyundai or rapid switches.
newsweek.comnewsweek.comOver 30,000 Republican Voters Change Party Affiliation After Pro-Trump Capitol...
, and 10 discuss broader voter registration trends without mention of any scandal-induced rapid switching.
nytimes.comnytimes.comThe Democratic Party’s Voter Registration Crisis
pbs.orgpbs.orgMore than 1 million voters switch to GOP, raising alarm for Democrats
What the Evidence Shows
The claim that "After the Trump Hyundai scandal hundreds of GOP registered voters switched to Democratic Party in 48 hours" cannot be substantiated based on the available sources.
None of the sources mention a 'Trump Hyundai scandal' as a political event or catalyst for voter party switching. The only reference to Hyundai relates to a federal immigration raid at a Hyundai factory involving South Korean nationals, which is unrelated to voter registration or party affiliation changes.timesofindia.indiatimes.comtimesofindia.indiatimes.comUS vs Seoul? Hundreds of South Koreans detained after Trump admin crackdown at...
Several sources discuss voter party affiliation changes, but none link these changes directly to any scandal involving Trump and Hyundai. For example, reports over 30,000 Republican voters changed party affiliation after the pro-Trump Capitol riot, but this is a different event and timeframe.newsweek.comnewsweek.comOver 30,000 Republican Voters Change Party Affiliation After Pro-Trump Capitol...
Other sources describe broader trends of voter registration shifts, including millions switching parties over longer periods, but do not specify rapid switches within 48 hours or connect them to any scandal.nytimes.comnytimes.comThe Democratic Party’s Voter Registration Crisis
pbs.orgpbs.orgMore than 1 million voters switch to GOP, raising alarm for Democrats+1 more
The Dartmouth and Pew Research Center reports provide demographic and electoral analyses without mentioning any sudden mass party switching tied to a Hyundai-related scandal.pewresearch.orgpewresearch.orgAge, generation and party identification of registered voters
home.dartmouth.eduhome.dartmouth.eduVoters' Views of Their Own Party Shift After 2024 Election+2 more
The absence of any direct evidence or reporting on such a rapid and specific voter shift linked to a 'Trump Hyundai scandal' suggests this claim is unverified and likely inaccurate or fabricated.
In summary, while voter party switching does occur and has been documented in various contexts, there is no evidence supporting the specific claim about hundreds of GOP voters switching to Democrats within 48 hours due to a Trump-Hyundai scandal.