About us  We are one of Stillwater’s oldest and largest family owned and operated independent service centers.  We have a 7200 square foot facility, ASE certified technicians and state of the art equipment.  We are a member of the Greater Stillwater Chamber of Commerce and active in the Alliance of Automotive Service Providers automotive association.  We Specialize in Automotive Computer Diagnostics for example check engine – ABS – airbag – and traction control. We are a complete bumper to bumper mechanical service and repair facility for domestic and import vehicles including light trucks –  gas and diesel.  We stand by all our repairs with a one year/12,000 mile warranty. 
Company History  Happy Thomsen, Sr. has spent most of his life working as a mechanic.  While in training in the U.S. Army he was certified for operation of all military vehicles.  He served in Vietnam in 1967-1968 and was in charge of transportation for the 9thInfantry Division.   He owned a service station in Stillwater, kiddy corner from the Lowell Inn, worked for Bud Snow Texaco on Arcade and Maryland in St. Paul and for Countryside Repair in Stillwater.  Stillwater Automotive Diagnostic Center (now known as Happy’s Stillwater Automotive) was founded in August of 1989 and was financed by Lake Elmo Bank.  Happy wanted to continue his passion of helping people by fixing their cars and light trucks.  With the loyal customer base expanding, Happy hired some of the best and the brightest automotive superstars.  His goal was always to provide honest service and repairs while earning his customers’ trust.  Today, Happy’s  qualified team of technicians and service advisors is ready to serve you. 


 1730 Industrial Blvd. | Stillwater, MN 55082
(651) 439-0581 | (800) 468-0601