My 1994 Mazda Miata has suffered over the years with a very poor headlight setup. It got to the point where I just did not enjoy driving it at night anymore. The pathetic yellow light dripped from the front of the car, providing limited visibility, even in urban driving. Rural driving, out where I live, was just down right scary.
So, I finally decided to do something about it. I ultimately decided to upgrade my sealed beams for a set of Cibie eCode projectors fitted with H4 100/80W bulbs. When upping the watts and amperage from stock values to these floodlights, it is important to add an aftermarket lighting relay. Your factory wiring harness and light switch will thank you, 20 year old thin wire usually does not like having 10+A flowing through it on a regular basis.
First step, buy a quality relay harness that will work with your Miata. The picture below shows the unit I went with. Installation took all of about an hour. I suggest connecting the power to the main fuse panel via the main breaker bolt. Also, wire it in with your stock lights first to test operation before upgrading to the H4’s. Changing one thing at a time helps with troubleshooting if you run into any issues.
The next step is to replace your sealed beams with the Cibie eCodes. These are European styled projectors that will amaze you with how much better they project light down the road. The light is focused, yet is aimed so as not to dazzle oncoming traffic. Swapping out the projectors just involve popping your headlights, removing the plastic shroud around the pop-up, and then loosen the three screws around the silver retaining benzel.
Lastly, we get to the Hella H4 100/80W bulbs. Most folks will stick with the more standard 60/55W bulbs, however I highly recommend upgrading to a higher wattage. The difference in output is just stunning, and when combined with the Cibie eCodes, you will not blind other drivers. There are other wattage H4’s such as a 130/90, 130/100, and 100/90. As long as you have upgraded your wiring with a relay harness, it is safe to give these bulbs a try. However, it has been reported that the high wattage bulbs have very short lifetimes, sometimes only hundreds of hours before they fail. Also, care must be taken when installing an H4 to get NO fingerprints on the bulb. The oil from your hands will cause early failure as well.
If you shop around (click on pictures to see on Amazon), you can pick up all the parts you need for less than $150. And, future replacement bulbs can be picked up for less than $10 each. Don’t put it off, click on the pictures above, go to Amazon, and be amazed at how awesome a new headlight setup will enhance your night time driving! Leave a message to let us know how it goes for you.