Whether for your personal safety, for roadworthiness tests or to avoid a fine, being certain your turn signal bulbs are all the time functional is extremely important. Surely, bulbs are wearing auto parts that will obviously burn out after a while and therefore need to be replaced. You’re almost certainly on this page because one of your rear turn signals is burnt out and you’re questioning how to change the bulb of a rear turn signal on you smart forfour, we’ve posted this article to teach you do it on your own without having to go to your technician. In a first step, we will examine the checking a burnt-out rear turn signal bulb on your smart forfour and in a second step, how to change the rear turn signal bulb on your smart forfour.

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How do you know if the rear turn signal bulb on your smart forfour is burnt-out or needs to be replaced?

When you drive your vehicle you don’t all the time have the possibility to examine all the safety features of your smart forfour. Surely, you are more often than not in a hurry and are likely to get into your vehicle, make your trip and put it down straight away without taking the time to do an occasional check-up. It is due to this fact necessary to take a little time to on occasions examine the condition of your headlights and turn signals. It’s quite possible that you have a burnt-out rear turn signal on your smart forfour, but you didn’t detect it. Here are the two simple techniques to examine if a rear turn signal on your car is out of order or if you need to change it quickly:

  • When you stop, turn on the ignition on your smart forfour, then alternately turn on your left and right rear turn signals and get out of the car to examine that they are operational.
  • By paying attention to the sound of your turn signals. In truth, there is an audible signal on each car that alerts you of a rear turn signal bulb burnt out on your smart forfour, you will recognise that the time between each “click” is much closer, this suggests that that you will have to change the rear turn signal bulb or before. It’s up to you to check and validate which one is burnt out by a visual check as on the first methodology shown above.

You may have another bulb to change, like the one of your low beam smart forfour or your position lights on smart forfour, don’t hesitate to have a look at our publications to help you to achieve this replacing.

Replacing the rear turn signal bulb on my smart forfour

Now let’s go to the most instersting step of this guideline, how to change the rear turn signal bulb on smart forfour? You should be aware that this procedure is very simple, you will need to access, from the inside of your trunk, your headlight unit, open it and change the burnt out rear turn signal bulb on your car. If it is a bulb on your front turn signal on your smart forfour, see our specific article. Nevertheless, here are the detailed steps to stick to to be able to carry out this work properly:

  • To access the tail light assembly, take out the carpeting or plastic cover to access the tail light assembly.
  • Use a screwdriver or torx wrench (6-pointed star) to open the tail light assembly.
  • Take off the rear indicator bulb from your burnt-out turn signal that you have earlier in this article diagnosed by an external visual inspection, for this you will need to make a quarter turn in a counter-clockwise way
  • Replace the rear turn signal bulb on your smart forfour. There are two kind of bulbs, transparent bulbs when the cover is orange, or orange bulbs when the cover is transparent, choose the right model for your car
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  • Put back in place your rear turn signal bulb and close your tail light block, then, examine your new turn signal bulb is working properly

To get more tips on the smart forfour, take a look at the smart forfour category.