Great work, but it probably is time to change the sensor. As mentioned before, there are alternatives to the "overpriced" MB Bosch sensor. As indicated in other posts, the Ford Mustang 5.0 sensor is the identical 3 wire Bosch made sensor, you just have to do some wire surgery, which you appear to be quite capable of! I bought one of the the www.oxygensenors.com kits since it was pretty much complete with shipping for the cost of rounding up the parts from the NAPA store. I'm waiting for a free weekend to get under the car to install.

the sensor was changed in the past and im assuming that when the bulb was removed due to it being unresetable, but i will be looking into a new sensor anyways, it cant hurt to replace it

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1984
190e 2.3L
107000 miles

The Service manual states that the bulb should be removed from the instrument cluster once it goes off, it never mentiones anything about reseting the light, but reseting it is even better then tossing the bulb, Great work!

I've replaced the sensor and hooked the bulb back up previously and since that time the O2 light has been coming on and off whenever it felt like it, but I'll take a look into resetting it.

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