Taillight issue

Hey all, while heading up on a trip today, another person im with notified me of a tail light that’s out. Bottom left.
This was with my DRLS on.

Everything else works including braking turn signal ect.

to my knowledge though, it’s one bulb so please correct me!
What do I need to replace? Part numbers if applicable are appreciated!

 

I’m going to guess 4157 but I’m probably wrong

 

I was also informed 7443 so I’m not sure

 

I just take out the bad one and take it with me to the store. The bulb will also have the number on the base.

 

Update: Bishop,Ca autozone had 7443 and they work!

thanks for the help all!

 

3157 IIRC. Get a VLED replacement and never worry about it again.

EDIT: Bollocks, I was wrong. 7443 it is. OP, that LED is reliable but be sure to get the RED version and not the white one. Red color goes through the lens better and is more visible to the guy following you.

 

Will definitely get one when I get back in a few days… figured this temporary solution would be better than nothing though.

many specific ones you may recommend? Also what lamp is the 3157 for?