The blue vehicle (whose occupant's identity is never revealed) that Mr. Bean encounters and causes to get into accidents in some episodes is a light blue Reliant Regal Supervan III. This model has a history of being highly unstable and easily tipped.
The title music "Ecce homo" ("Behold the man"), like many TV themes by Howard Goodall, was originally written as a serious piece of church choral music. New lyrics (in Latin) were written for "Mr. Bean": "Ecce homo qui est faba. Vale homo qui est faba" ("Behold the man who is a bean. Farewell the man who is a bean").
Mr. Bean's first name is confirmed to be "Mr." throughout the TV series and the spinoff movies. There are several occasions where he writes his full name as "Mr. Bean" on registers or envelopes, or shows his printed driver's licence or passport with "Bean" in the Last Name slot and "Mr." in the First Name slot. (There used to be a rumour that one scene in a TV show or movie shows a passport giving his name as "Rowan" after Rowan Atkinson, but no specific citations or screen captures have ever been provided to back up this rumour, which probably isn't true. His first name is consistently "Mr.".)