"if you need to replace your tail light bulb, first remove the cover (it's round) from the inside of your trunk, there will be a black knob that needs to be unscrewed totally to release the back light casing. Next, along the rear fenders where the lights are, there are two gaps. The inside gap (nearest hatch back door) is a release tab/clip on the light inside between the gaps. Insert a butter knife or something slim and pull out casing (don't be afraid, and it takes a little force to pull it out). After you pull out the casing, you'll find two light switches (one is for the turn signals and other is your break lights). Turn the light switch counter clockwise (assuming it's hanging upside down) and remove. Switch out light bulb with new one (autozone has them for about $4.00 - package of 2) replace every thing back as you uninstalled it. It's recommended to replace all bulbs, that way you don't have to do it again later when the other goes out. It'll save you lots of time and money. Hope this will help anyone so print and save in your manual for later use."
Before I go scratching up my rear quarter, I want a better idea of where these "GAPS" are to release the clips.
see link
its like changing a light bulb and depends on the car model 2007 volkswagen beetle
how to reset change oil message on 2013 beetle
The brake light switch is found behind the 1998 VW Beetles brake pedal. Reach it by removing the lower dash console to gain access to the nut holding the switch in place. Remove the nut then then the switch.
It is threaded into the master cylinder. If you can't reach from under, remove the fuel tank to expose the master cylinder and brake light switch.
Don't bother. The brake light switch on 1999 beetles (maybe all of them, actually) have been recalled. Unless you get it changed, the brake lights will keep going out. Call your local dealer and they should change it for free, mine did about 8 months ago. Still, this doesn't seem to fix the problem as my brake light is out. It may only be a burned out bulb though.
The problem is a faulty brake light switch and there is a recall for that concern. Contact your nearest VW Dealer for more information.
The license plate light and connected right above the plate on a 2002 Volkswagen Beetle. To replace it just unscrew the old light and mount the new bulb.
At the end of the master cylinder. Probably the easiest way to gain accesss would be to remove the gas tank.
The cause of an exhaust indicator light in a Volkswagen Beetle is probably an oxygen sensor. There also a possibility that an exhaust pipe is plugged or there is a hole due to rust.
Its under the motor
To change the brake lights on a 1997 Volkswagen Polo first locate the brake light housings in the trunk. Remove the plastic covers and unlock the bulbs. Remove the bulbs and install the new brake lights.