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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
30 Reviews
4.8

30 Reviews

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30 Reviews of John Koo

January 14, 2026

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Employee Rating

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

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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
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Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Jack Willmon

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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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Purchase Time
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Recommend Dealer
Yes

Other Employees Tagged: John Saiyo, Herbert Perdomo, Max Cuadras, Nathan Stewart, Ronny Mogannam, Nino Christian Alaman, Roger Thurman, Wynette Myers, Garrett Oxnæs , Jai was great! He was my main salesman.

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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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Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
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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

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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
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Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Jaik

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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
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Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Herbert Perdomo, Greg Park, Scott Holden, Ronny Mogannam

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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.

October 12, 2025

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I was the easiest car buying experience I've had. Everyone was great. Loved Johnny! More

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

Other Employees Tagged: Max Cuadras

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Oct 13, 2025

Mazda Roseville responded

Dianna, Thank you for sharing your experience! We’re so glad to hear that buying your car was easy and enjoyable. Johnny will be thrilled to hear your kind words! We appreciate you choosing us and hope to see you again in the future.

October 09, 2025

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John was most helpful with all of our questions. We were never pushed to buy a vehicle, but we wanted to work with John after spending time looking over the vehicle options with him More

by miller10304
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Scott Holden

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Oct 10, 2025

Mazda Roseville responded

Thank you for sharing your experience! We're so glad to hear that John was helpful and made you feel comfortable throughout the process. e truly appreciate your trust and are happy you chose to work with John. Enjoy your new vehicle and we wish you many happy miles ahead!

October 04, 2025

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Employee Rating

We had the pleasure of working with Jai Edwards. We absolutely love our Jeep and. can’t thank him enough for his patience with us and giving us a great deal! Super friendly staff & service! More

by Steph Henry
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Max Cuadras , Jai Edwards

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Oct 06, 2025

Mazda Roseville responded

Steph, Thank you so much for sharing your experience! We’re thrilled to hear that Jai and our team made your Jeep purchase such a positive one. We truly appreciate your kind words about Jai’s patience and the friendly service you received. Enjoy every adventure in your new Jeep!

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