'99 Taillight Howto
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The 1993-1995 stock taillights are shown in the picture below on the left.  In 1996, Mazda changed the taillights to three circles on each side.  The 1996-1999 factory round taillights are available for purchase for about $480 per pair.  However, with a little craftiness and much less money, a virtually indistinguishable copy can be made using the 1993-1995 stock taillights.  Below on the right is my RX-7 after this modification.

 

Note:  Click on each image to display a larger version.

If you would like to update the taillights on your RX-7, I recommend purchasing a heat gun, an X-Acto Compass and Swivel Knife, Black Lacquer spray paint, and clear contact paper for masking.


 

First remove the taillights from the car.  When you open the trunk, there are three screws behind each taillight.  When you remove the screws, the taillights slide out away from the center brake light.
There are six screws on the back of each taillight and adhesive holding the cover to each taillight assembly.  After you remove the screws, carefully use a heat gun to soften the adhesive around the edges of the taillight cover.  I used the high (1100° F) setting on my heat gun, slowly moving it around the edges of the taillight assembly from the back (same view as to the left) several times for about five minutes.  If you hold the heat gun in one place too long, you will melt the plastic, so if you notice the black plastic assembly begin to get shiny, move on because it is starting to melt!
Once the glue is soft, you can pull the cover off the taillight assembly.  It takes some force, and I found it easier to start pulling at the outside where the turn signal is.  The adhesive can be stringy, so pull slowly and make sure no adhesive "strings" get onto the lenses.  The picture to the left show the taillights after the cover is removed.
There is one screw holding each lens to the taillight.  In addition, there is some more of the same adhesive at the top and bottom of each lens.  I didn't heat this area much, as the adhesive was soft enough to remove the lenses.
I recommend first making paper masks to tweak the placement in preparation for the final masking.  The circle for the turn signal is 75mm diameter, and the two circles for the brakes are 80mm diameter.  The X-Acto compass/knife made it easy to cut the circles.  The placement of these circles is the hardest part of this project.  I initially placed the circles attempting to have the center of each circle be directly in front of each bulb.  I then adjusted the circles to be centered vertically and then adjusted the middle (brake light) circle to be equidistant from the other two circles.
Once you have the circles exactly where you want them, place masking tape at approximate 90° intervals around the circles.  Using a straight edge, draw perpendicular lines (a cross) through the center point of the circle so that the lines extend onto each of the four pieces of masking tape.  The markings on the four pieces of masking tape will help you pinpoint the center point of the circle after you remove the paper circles. 
Cut out two 75mm and four 80mm circles using the clear contact paper.  Place a square piece of masking tape at the center of each area where the circle will be.  Using a straight edge and the marks on the masking tape previously placed at 90° intervals, redraw cross hairs on the new square piece of masking tape.  The contact paper masks will have pinholes in each center point from the compass used to draw or cut the circles.  Line up the center point of each circle with the cross hairs on the square piece of masking tape as you place them on the lenses.  This is where it comes in handy to have clear contact paper for your masks!
After the masks are firmly adhered to the lenses, remove the outside pieces of masking tape.  I recommend putting masking tape on the back of the lenses to cover the screw holes and contact paper on the back of the lenses to keep overspray from getting onto the back of the lenses.  Then use a green scrubbing pad to roughen up the glossiness of the lenses so that the paint will adhere better.  Finally use a moist paper towel to clean the surfaces.
I used glossy lacquer spray paint, which dries quickly and leaves a nice finish.  Make sure you spray the sides of the lenses in addition to the front so that no light comes through once you reinstall the lenses.  If you are not familiar with spray painting, spray in straight passes that start before and end after the object you are painting.  Don't let the spray paint get too heavy or it may run.  It is better to use several more lighter coats than fewer heavy coats that end up running.  Remember that the taillights are bright--make sure you have enough coats of paint (with about five minutes waiting time between coats if you are using lacquer paint) so that light will not be be able to shine through the painted area.
After about an hour, I removed the masks, starting by gently cutting a hole into the center (where masking tape was behind the circles) and then pulling up on the masks.  Slowly remove the masks from where they meet up with the paint to make sure the masks do not pull paint up from the lenses.  I then let the lenses sit overnight to fully dry.  Although I probably didn't need to let them sit that long, I wanted to be careful since they would be near the heat gun again.
Use the heat gun to heat up the adhesive in the holes where the lens tabs go, then insert the lenses and screw them in.  Make sure there is no dust on the lenses or the inside of the cover (I used a Swifter sheet) and then heat up the adhesive on the cover and taillight assembly to soften it.  Heating up the adhesive is easier this time since you can directly see it, but be very careful not to get the black plastic assembly too hot that it starts to melt!  If you notice the plastic start to look shiny, move on.  After the adhesive on both the assembly and cover is soft, put them back together.  After you push them firmly together, replace the six screws to complete the assembly.
You're done!  Just put the taillights back on the car so you can admire them. :-)

 

 

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Last Modified:  Friday, April 22, 2005