Three Mod Garages in San Andreas offer a wide variety of personalization options for many different vehicles. Mod Garages are marked on the map by a red wrench icon.

Many items can be purchased and/or upgraded at these garages; Paint Jobs, Vents, Hood, Exhaust, Spoilers, Lights, Nitrous, Roof, Wheels, Stereo, and Hydraulics. Most items will vary depending on the vehicle, but wheels cost $620 to $1560, custom paint jobs are $500, stereo upgrade is $100, and a hydraulics system is $1500. A Nitrous system is available in 3 different "strengths", 2×, 5×, and 10× (these options indicate how many times you would be able to use a nitro "boost").

TransFenderEdit

• Opens after Cesar Vialpando
  • Temple, Los Santos
  • Doherty, San Fierro
  • Come-A-Lot, Las Venturas

TransFender is a play on the word "transgender". It offers customization options for about 65 different car types. The amount of customization available varies for each car model. All cars can get basic paint jobs, a choice from 10 types of wheels (including off-road wheels) and hydraulics.

Loco Low Co.Edit

• Opens after Cesar Vialpando
  • Willowfield, Los Santos

Loco Low Co. specializes in eight Lowriders; these are the Blade, Broadway, Remington, Savanna, Slamvan, Tahoma, Tornado, and Voodoo. While most of the Lowriders have a plethora of options, options are limited with the Tahoma and Voodoo. All the Lowriders can be installed with nitrous, a bass boost upgrade, and hydraulics (if the vehicle is not installed).

Wheel Arch AngelsEdit

• Opens after Zeroing In.
  • Ocean Flats, San Fierro

Wheel Arch Angels specializes in six street racing vehicles; these are the Elegy, Flash, Jester, Stratum, Sultan, and Uranus. Unlike the other two modification garages, the available options among these vehicles are largely the same. You can choose between three custom paint jobs, Alien and X-Flow brand exterior mods in six areas of the car, ten types of tires/hubcaps, nitrous, stereo boost, and hydraulics.

In other Grand Theft Auto gamesEdit

• Grand Theft Auto V (see Los Santos Customs)