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Emissions and Smog Testing

Working Hours
  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
    Sat Closed
  • Sun Closed
    Closed 11:30AM-12:30PM Daily

At Andersen's Foreign Car Service, LTD, we help our Golden customers' cars run as cleanly and efficiently as they possibly can. We provide a range of emissions testing services to ensure that your car is running and driving its best, as well as complying with all local smog regulations. Should a problem arise with any of your vehicle's emission systems, we provide the parts and expertise to get you back on the road. Andersen's Foreign Car Service, LTD can replace mufflers/catalytic converters, refill diesel exhaust fluid, and make sure the full range of filters in your vehicle's exhaust system are working perfectly.

Regulators understand that older cars simply can't meet modern emissions standards without extensive modifications. For newer cars however, passing a smog test is a requirement of road legality. Call us at 303-278-8766 to learn more about the emissions requirements for your vehicle.

Emissions testing (also known as smog testing) is a vital part of the maintenance of your vehicle. E-tests provide your mechanic with important information about your car's engine and exhaust system. If important components, like your car's catalytic converter aren't working properly, the car isn't running as it was intended to by the manufacturer. Inefficiency costs you extra money in fuel and does unnecessary harm to the planet. Emissions testing can also affect the value of a vehicle you're trying to sell; while you can still sell a car without a valid e-test certification, you'll get more money for one that has passed the test.

There are several reasons that a car may fail its emissions test. There may be a problem with the vehicle's fuel system adding too much fuel to the air-fuel ratio required for proper combustion within the cylinders of the car's engine. This is known as "running rich" and results in the smell of gasoline from fuel passing through the engine and exhaust system without being fully burnt. Causes of this issue range from faulty fuel injectors to issues with the engine's control computer. There may also be problems with oxygen sensors or the vehicle's ignition system. At Andersen's Foreign Car Service, LTD, we use a complete set of diagnostic equipment to determine the problem and fix it quickly, explaining every step of the process to you, our valued patron. Call us at 303-278-8766 or send us an email to arrange a health check for your car's emissions system today!

What People Say About Us


  • -Lori Prince - Garner, NC

    Wonderful customer service!


  • -Samantha W.

    Friendly staff, comfortable waiting room. Competent. I really couldn't ask for much more.


  • -Mike A.

    Family owned car repair and service provider specializing in foreign cars. I prefer Andersen's above dealer shops for my BMW 535XI.


  • -Calvin P.

    Very professional and very honest!


  • -Glenn M.

    Walked right on had my Volkswagen tdi emissions tested. Barely too any time. Nice staff. I'll go back even though it's not the closest.


  • -Ann S.

    We have been customers at Andersen's for over 25 years. I trust them completely. We have taken Volvos and BMWs there without any complaints as to the quality of service received.


  • -Aleise P.

    Kurt is the best!! We have been customers for nearly twenty years and Andersen has serviced our Volvos, Mercedes, BMWs and MINIs, both gas and diesel, for minor and major repairs. It's hard to find an honest shop but Andersen is the real deal! Always timely, reasonably priced and up-front. I will only have my cars serviced here.


  • -Omar C.

    Nice people.


  • -Nate B.

    Fast and friendly diesel emissions testing location. Generally don't have any issue getting an appointment within a week of calling.


  • -Jeremy

    Diesel emissions test is the reason for my yearly visit. The gal that runs it is very knowledgeable.


  • -Warren S.

    Great place to go for diesel emissions.


  • -Danielle W.

    Kurt is awesome!


  • -Gary A.

    They know the ins and outs of German and Swedish cars and attend personally to routine and non-routine issues.


  • -Dean S.

    A few months ago, I discovered a gas leak that appeared to be around the gas tank of my 2005 E55 AMG Mercedes. I ordered this car in 2004...it's my all time favorite car. I had the car towed to Andersen's in Golden. A couple of days later I get a call from Kurt Andersen. They had inspected the car and found the leak. Before proceeding with the work, they checked for any outstanding recalls on my car and, amazingly, found an open recall campaign that had been issued on my car years ago. I had never received any notice of the recall. Kurt called Mercedes of Denver to verify that the recall was valid. To make a long story short, Mercedes covered over $2,000 in parts and labor...Andersen could have easily made the repairs and charged me, but they didn't, they took the extra step for the customer. I sum this all up in one word, INTEGRITY. A rare commodity in many businesses today. Thank you to Andersen's.


  • -Jim B.

    Been going to these guys for years for my old diesel. Tried a different place a while back and quickly returned to Andersen with no regrets. I will echo other comments about it being an honest shop.


  • -D.

    Top notch honest shop.


  • -Maxwell B.

    I really have enjoyed working with the staff at Andersen's. I will normally try to do the repairs myself, but when I can't, I trust that they will do a good job at a good price.


  • -Fredrick R.

    Super friendly and fixed my car quickly and all for a great price. Will go there next time my car has anything wrong!


  • -Jessica H. B.

    They are honest and hard working, not to mention considerate. I would highly recommend Andersen's.


  • -Lori Prince - Garner, NC

    Wonderful customer service!

Call us for service: 303-278-8766

Bosch Authorized Service Center
ASE (Automotive Service Excellence)
BBB Accredited Business
ASA (Colorado Automotive Service Association)
IDENTIFIX
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