STG Auto Group of Ontario

05/23/2026

You just found the dealership that actually has OPTIONS. 🚗🔥 1,800+ vehicles. Endless choices. STG Auto Group of Montclair — this is how we do it.

05/22/2026

Best Memorial Day deals under $20K are here at STG Auto Group 🇺🇸🚗Don’t miss your chance to save big this weekend!

05/22/2026

Memorial Day Special 🇺🇸 This 2025 Kia K4 GT-Line is available now at STG Auto Group for only $22,654. Limited-time offer — don’t miss your chance to drive it home.

05/22/2026

Built to dominate the streets and the dirt. 🦖🔥 2023 Ford Bronco Raptor now at STG Auto Group.

05/21/2026

This Memorial Day Weekend, your freedom to drive starts at STG Auto Group 🇺🇸🚗 With over 1,800 vehicles to choose from, massive deals, and financing options for everyone — ITIN, bad credit, no credit, no problem.

05/21/2026

Memorial Day Special 🇺🇸 This 2022 Toyota Camry SE is available now at STG Auto Group for only $21,133. Limited-time offer — don’t miss your chance to drive it home.

05/21/2026

That Zandvoort Blue hits different. 💙🔥 The 2024 BMW M2 isn’t just built to turn corners — it’s built to turn heads.

05/20/2026

Buying a car shouldn’t feel impossible. At STG Auto Group, we believe everyone deserves a fresh start and a reliable car they can count on.📍STG Auto Group Your fresh start begins here.

05/20/2026

Memorial Day Special 🇺🇸 This 2021 Mercedes-Benz GLB 250 is available now at STG Auto Group for only $20,134. Limited-time offer — don’t miss your chance to drive it home.

05/20/2026

This isn’t just a truck… it’s a TRD Pro. 2025 Tacoma just changed the game.

05/19/2026

The 2025 Toyota Land Cruiser 1958. Old soul. New beast. This is THE Land Cruiser. 🏔️🔥

06/08/2022

Pre-owned 2015 Ram 1500 Tradesman 2WD Quad Cab 140.5 Tradesman Regular Unleaded V-8 5.7 L/345 for only *$24486 at STG Ontario near Montclair, CA

VIN: 1C6RR6FT2FS553304
STOCK: P62769
Body Style: Crew Cab Pickup
Model Code: DS1L41
Engine: Regular Unleaded V-8 5.7 L/345
Drive Type: RWD
Transmission: 6-Speed Automatic w/OD
Ext Color: Granite Crystal Metallic Clearcoat
Int Color: Diesel Gray/Black
Mileage: 55587
Address: 10477 Central Ave Montclair, CA 91763

Research the 2015 Ram 1500 Express in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 1C6RR6FT2FS553304

06/07/2022

Pre-owned 2020 Toyota 4Runner TRD Off Road TRD Off Road 4WD Regular Unleaded V-6 4.0 L/241 for only *$40571 at STG Ontario near Montclair,CA

VIN: JTEBU5JR7L5772263
STOCK: F58381
Body Style: Sport Utility
Model Code: 8670
Engine: Regular Unleaded V-6 4.0 L/241
Drive Type: 4WD
Transmission: 5-Speed Automatic w/OD
Ext Color: Silver
Int Color: Black/Graphite
Mileage: 49136
Address: 10477 Central Ave Montclair, CA 91763

Research the 2020 Toyota 4Runner TRD Off-Road in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN JTEBU5JR7L5772263

06/06/2022

Pre-owned 2020 Tesla Model 3 Performance Performance AWD Electric for only *$62888 at STG Ontario near Montclair,CA

VIN: 5YJ3E1EC2LF736127
STOCK: M58304
Body Style: 4dr Car
Model Code: MODEL3P
Engine: Electric
Drive Type: AWD
Transmission: 1-Speed Automatic
Ext Color: Black
Int Color: Black
Mileage: 15361
Address: 10477 Central Ave Montclair, CA 91763

Research the 2020 Tesla Model 3 Performance in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 5YJ3E1EC2LF736127

06/03/2022

Pre-owned 2018 Ford Flex SEL SEL FWD Regular Unleaded V-6 3.5 L/213 for only *$25555 at STG Ontario near Montclair,CA

VIN: 2FMGK5C88JBA01626
STOCK: 56613
Body Style: Sport Utility
Model Code: K5C
Engine: Regular Unleaded V-6 3.5 L/213
Drive Type: FWD
Transmission: 6-Speed Automatic w/OD
Ext Color: Oxford White
Int Color: Charcoal Black
Mileage: 49285
Address: 10477 Central Ave Montclair, CA 91763

Research the 2018 Ford Flex SEL in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 2FMGK5C88JBA01626

06/01/2022

Pre-owned 2018 Acura RDX Technology & AcuraWatch Plus Packages w/AcuraWatch Plus Pkg FWD w/Technology/AcuraWatch Plus Pkg Premium Unleaded V-6 3.5 L/212 for only *$29500 at STG Ontario near Montclair,CA

VIN: 5J8TB3H50JL000462
STOCK: E58175
Body Style: Sport Utility
Model Code: TB3H5JKXW
Engine: Premium Unleaded V-6 3.5 L/212
Drive Type: FWD
Transmission: 6-Speed Automatic w/OD
Ext Color: Black
Int Color: Ebony
Mileage: 28316
Address: 8625 Artesia Blvd Bellflower, CA 90706

Research the 2018 Acura RDX Technology & AcuraWatch Plus Packages w/AcuraWatch Plus Pkg in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 5J8TB3H50JL000462

05/31/2022

Pre-owned 2017 Tesla Model X 75D SUV for only *$0 at STG Ontario near Montclair,CA

VIN: 5YJXCDE29HF052263
STOCK: M58331
Body Style: SUV
Model Code: 75D
Engine: Electric
Drive Type: 4WD
Transmission: Automatic
Ext Color: Gray
Mileage: 28151
Address: 10477 Central Ave Montclair, CA 91763

Research the 2017 Tesla Model X 75D in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 5YJXCDE29HF052263

05/03/2022

Pre-owned 2020 Dodge Challenger GT GT RWD Regular Unleaded V-6 3.6 L/220 for only *$32711 at STG Ontario near Montclair,CA

VIN: 2C3CDZJG0LH173023
STOCK: P61919
Body Style: 2D Coupe
Model Code: LADL22
Engine: Regular Unleaded V-6 3.6 L/220
Drive Type: RWD
Transmission: 8-Speed Automatic w/OD
Ext Color: Indigo Blue
Int Color: Black
Mileage: 11684
Address: 10477 Central Ave Montclair, CA 91763

Research the 2020 Dodge Challenger GT in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 2C3CDZJG0LH173023

04/26/2022

Pre-owned 2019 Jeep Renegade Latitude Altitude FWD Regular Unleaded I-4 2.4 L/144 for only *$0 at STG Ontario near Montclair,CA

VIN: # ZACNJABB3KPJ86716
STOCK: P62417
Body Style: Sport Utility
Model Code: BVTM74
Engine: Regular Unleaded I-4 2.4 L/144
Drive Type: FWD
Transmission: 9-Speed Automatic w/OD
Ext Color: Granite Crystal Metallic Clearcoat
Int Color: Black
Mileage: 50887

Research the 2019 Jeep Renegade Latitude in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN ZACNJABB3KPJ86716

04/25/2022

Pre-owned 2016 Ford F-150 XLT 2WD SuperCrew 145 XLT Regular Unleaded V6 3.5 L EcoBoost for only *$31844 at STG Ontario near Montclair,CA

VIN:
STOCK: M57793
Body Style: 4D SuperCrew
Model Code: W1C
Engine: Regular Unleaded V6 3.5 L EcoBoost
Drive Type: RWD
Transmission: 6-Speed Automatic w/OD
Ext Color: White
Int Color: Gray
Mileage: 39213

Research the 2016 Ford F-150 XLT in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 1FTEW1C87GKE74389

04/15/2022

Pre-owned 2018 Audi SQ5 Premium Plus 3.0 TFSI Premium Plus Intercooled Turbo Premium Unleaded V-6 3.0 L/183 for only *$44140 at STG Ontario near Montclair,CA

VIN: # WA1A4AFY7J2226614
STOCK: P58965
Body Style: Sport Utility
Model Code: FYB54A
Engine: Intercooled Turbo Premium Unleaded V-6 3.0 L/183
Drive Type: AWD
Transmission: 8-Speed Automatic w/OD
Ext Color: Black
Int Color: Gray
Mileage: 24257

Research the 2018 Audi SQ5 3.0T Premium Plus quattro in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN WA1A4AFY7J2226614

04/08/2022

Pre-owned 2018 Toyota 4Runner SR5 SR5 4WD Regular Unleaded V-6 4.0 L/241 for only *$38750 at STG Ontario near Montclair,CA

VIN:
STOCK: P59701
Body Style: Sport Utility
Model Code: 8664
Engine: Regular Unleaded V-6 4.0 L/241
Drive Type: 4WD
Transmission: 5-Speed Automatic w/OD
Ext Color: Gray
Int Color: Black Graphite
Mileage: 45052

Research the 2018 Toyota 4Runner SR5 in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN JTEBU5JR2J5600994

04/04/2022

Pre-owned 2019 Jeep Grand Cherokee Laredo E Laredo E 4x4 Regular Unleaded V-6 3.6 L/220 for only *$31828 at STG Ontario near Montclair,CA

VIN:
STOCK: P60083
Body Style: Sport Utility
Model Code: WKJH74
Engine: Regular Unleaded V-6 3.6 L/220
Drive Type: 4WD
Transmission: 8-Speed Automatic w/OD
Ext Color: Granite Crystal Metallic Clearcoat
Int Color: Black
Mileage: 43717

Research the 2019 Jeep Grand Cherokee Laredo E in Ontario, Montclair & Garden Grove, CA from STG Auto Group. View pricing, pictures and features on this vehicle. VIN 1C4RJFAG4KC546918