I have listed all the bulbs that people have difficulty cross referencing when using Lexus part numbers. All the bulbs can be found at any parts store so you will not have to go to Lexus and pay $$. It is not in any specific order but the most common is the front turn signal/DRL. Hope this helps. Sorry it turned out squished together.

Location Bulb Type/base AKA

Front map light 1895 ba9s Bayonet 53, 57, 1445, 1893 6253, 64111
Rear lights Interior 31MM Festoon 3021 3022 3175 6428 6430
Front signal/DRL 1156 Bayonet 1073 1093 1295 1651 7506 7527
Reverse light 7440 Wedge
Signal rear 7443 Wedge
Running board 194 Wedge W5W 147 158 159 168 1251 2450
License light 194 Wedge
Low Beam H11
High Beam 9005