It’s proper to check one’s car(s) for Chametz on the night of the 14th
using a flashlight. Otherwise, one should check it during the day.
No Bracha is required for performing Bedika in a car¹. This is true even of a car that will not be used on Pesach itself. (Source:
The following was asked by someone who had a similar question. They were wondering if they have to make a brocho on checking the car, as that would be the only place to check when it comes to the night of bedika. Below, is the relevant part of the answer.
...one should not make a beracha when doing a bedikat chametz on the car
alone because the original ordinance was to check a house and a car is
considered a utensil.(הליכות שלמה ,ניסן עמ' קיא). However, according
to Rav Ben Tzion Abba Shaul zt"l , when doing a bedikat chametz on the
car alone, one may make a Bracha on checking the car. (אור לציון ג,
פרק ז, סי' ט, יט) (source)
So apparently there is a machloket. One should consult their Rabbi for practical advice.
1. Yechave Daat 1:5 and Halichot Shlomo (vol 1, 5:5) write that one should check the cars on the night of the 14th and if not then it should be checked on the day. Halichot Shlomo and Halachos of Pesach (pg 71) in name of Rav Moshe Feinstein hold that no Bracha is made on this Bedika. Yechave Daat 1:5 also agrees