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Old 10-05-2019, 07:38 AM   #1
RCRV
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Default sl1 2002. What sensors to replace?

Just bought a 2002 sl1 with 125,000 miles on it. Everything seems to work as it should but as preventive maintenance I intend to replace all engine sensors. They are not that expensive and I can do it myself.

My question is what sensors are on this engine? Mass air flow, throttle position, O2, coolant temperature...... any others?
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Old 10-05-2019, 08:36 AM   #2
Waiex191
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1998 SC2
Default Re: sl1 2002. What sensors to replace?

Here is my take on it. The OEM sensors are pretty awesome. The replacements, not always as good. Every AC Delco part I've recently bought has been from China. I would not replace them proactively, just look for the symptoms. With a 2002 I would expect you have a brass ECTS but I would check the connector for corrosion. The TPS will wear eventually, but this shows up as high or hokey idle and won't strand you. If it was me, I'd research the symptoms for various component failures for the sake of educating yourself, and replace only as needed.

Definitely replace all the fluids. Then you know their status!
...
Bryan Cotton
'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018
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Old 10-05-2019, 10:00 AM   #3
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Default Re: sl1 2002. What sensors to replace?

Quote:
Originally Posted by Waiex191 View Post
...If it was me, I'd research the symptoms for various component failures for the sake of educating yourself, and replace only as needed...
As proactive as I am with how my Saturn runs, I agree with Waiex191.

While your car is still running well, you could take the time to find some OEM parts, if possible, and keep them stored for when you really do need them.
...
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Old 10-05-2019, 12:54 PM   #4
RCRV
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Default Re: sl1 2002. What sensors to replace?

Thank you both for your answers.
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