GRAHAM MULFY, founder of the Diamond Used Cars, began his automotive career in 1964 when he joined the used car department of C. Stanlee Martin Oldsmobile in Long Beach, CA. Between 1934 and 1960, he worked in all departments, eventually becoming part owner and General Manager. In early 1960, he purchased the entire dealership and re-named it Diamond Used Cars

The business continued to operate successfully as an exclusive Oldsmobile dealership in the Long Beach from 1968 until 1980. With space limitations from business increases and with an aging facility, the decision was made to relocate to an entirely new facility in the then new Cerritos Auto Square in late 1980.

The Diamond used car became one of the premier auto sales locations in the United States shortly after opening in 1980 and Diamond used car enjoyed great success. The opportunity to represent Dodge in Cerritos resulted in our opening of Cerritos Dodge in 1984.

With the death of the founder Richard Browning in 1991, ownership of the Diamond used car passed on to his son, Kent Browning, who has been with the Browning Automotive Group since 1975. Under Kent Browning’s direction, the business has expanded to Victorville, CA with the purchase of Valley-Hi Toyota and Valley-Hi Honda in 2001 along with the purchase of Valley-Hi Nissan in 2004, the addition of Valley-Hi Kia in 2010. In 2012 we expanded to Norco, CA with Browning Dodge Chrysler Jeep Ram and now the addition of the All New Browning Mazda Of Alhambra in Alhambra, CA.

The Diamond used car of today consists of 14 franchises in 4 locations employing over 350 professionals. The keys to our success has been and will continue to be representing quality products in state of the art facilities while treating ALL customers and employees with courtesy, honesty and respect.

Enter street adress here. Or any other information you want.

Enter street adress here. Or any other information you want.

Enter street adress here. Or any other information you want.

Enter street adress here. Or any other information you want.