John Koo
John Koo at Mazda Roseville

John Koo

Sales Associate

Mazda Roseville

800 Automall Dr
Roseville, CA 95661

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4.8
33 Reviews
4.8

33 Reviews

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33 Reviews of John Koo

January 30, 2026

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Employee Rating

Great sales experience from Johnny Koo and Roseville Mazda. Johnny was super helpful, knowledgeable on all the car's features, and did not apply any high pressure sales tactics. Overall it was a wonde More

by kevmo77
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Recommend Dealer
Yes
Jan 30, 2026

Mazda Roseville responded

We’re so glad to hear Johnny took great care of you and made the experience easy and pressure-free. It’s awesome that he walked you through all the features and helped make car buying feel enjoyable. Enjoy your new Mazda.

January 27, 2026

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My experience at Roseville Mazda was pleasant purchasing my used car. Johnny our salesman was helpful and sincere. I highly recommend this dealership for car purchases. More

by tomblanton6323
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Recommend Dealer
Yes
Jan 28, 2026

Mazda Roseville responded

Tom, Thank you so much for sharing your positive experience. We’re so happy to hear Johnny took such great care of you. Enjoy your new vehicle!

January 24, 2026

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Would rate 5 stars if a cash deal wouldn’t have taken so long. Other than that it was great More

by ajcoker53
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Recommend Dealer
Yes
Jan 27, 2026

Mazda Roseville responded

We’re so happy to hear you had a great experience with us! We really appreciate your patience during the process and your honest feedback. We have shared your feedback with the team to see how we can improve speed next time.

January 14, 2026

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Excellent service by Christian and John. Professional, friendly, knowledgeable and no pressure. Overall, great experience! More

by MARK WOLBER
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Recommend Dealer
Yes

Other Employees Tagged: Nino Christian Alaman , Jacob W

Jan 16, 2026

Mazda Roseville responded

Mark, We’re glad to hear that Christian and John provided professional, friendly, and knowledgeable support without any pressure. We are so grateful for your business.

December 12, 2025

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I was surprisingly amazed that the Roseville Mazda Dealership is nothing like some of the other dealerships in the Roseville Automall. I was very hesitant about driving all the way out there just to b More

by Cozziex3
Sales Price Transparency
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Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Jack Willmon

Dec 15, 2025

Mazda Roseville responded

We’re thrilled to hear that your visit to Roseville Mazda exceeded your expectations. Creating a welcoming, pressure-free environment is exactly what we aim for, and it’s wonderful to know that you felt appreciated and comfortable throughout your visit. Congratulations on your new 2026 CX-90! We’re honored that you chose to make Roseville Mazda your dealership of choice, and we look forward to supporting you throughout your ownership journey.

December 02, 2025

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Good service, everything went smooth, no hassle and I walked out a happy customer! Period. More

by RIVERA
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Recommend Dealer
Yes
Dec 02, 2025

Mazda Roseville responded

Thank you for the amazing review! We are so glad to hear yo had a wonderful experience with us. We look forward to the next time!

November 25, 2025

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The only issue is the steering wheel is not straight when driving from Roseville back to the Bay Area. Anyway we'll get it resolved somehow, out of our pocket!!! More

by hpham88
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Recommend Dealer
Yes
Nov 25, 2025

Mazda Roseville responded

Thank you for the positive feedback and for recognizing John’s help! We’re glad to hear most of your experience went well. Please contact our General Sales Manager, Steven Khuu at 916-755-5650 to review your concern with the alignment.

November 09, 2025

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We had an awesome experience with Johnny and Jaik. Love my Mazda and live being a repeat customer. Everyone was super friendly, helpful, and professional. More

by ellicerilly
Recommend Dealer
Yes

Other Employees Tagged: Jaik

Nov 10, 2025

Mazda Roseville responded

Thank you for the 5-star review! We are so glad you had such an incredible time with us. We appreciate your business and look forward to a long-lasting relationship!

October 31, 2025

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Johnny Koo was friendly from the start along with an abundance of knowledge, patience, kindness, and humor. He is a terrific salesman that made me feel comfortable. More

by tracyo
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Jaik

Oct 31, 2025

Mazda Roseville responded

Thank you so much for your kind words! Were delighted to hear that Johnny Koo left such a lasting impression. We agree that he's amazing and we look forward to a long-lasting relationship!

October 13, 2025

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Thank you, Mazda Roseville, for providing such remarkable and consistent customer service. I want to extend a special note of gratitude to Ronny Mogannam for making my experience stress-free, enjoyable, and More

by pazdapoc9
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
Oct 13, 2025

Mazda Roseville responded

Thank you for your kind words! We’re thrilled to hear that you had a stress-free and enjoyable experience with us. Ronny will be especially delighted to hear your shoutout! We truly appreciate you choosing us and hope to see you again soon.

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