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View Full Version : Led stem cap alerts


dopple
07-18-2008, 10:07 AM
My new/used M3 has caps with Leds in them on the tire valve stems that go off when pressure falls 5 lbs below original set pressure.

Has anyone used these before and how do you like them?

Pinecone
07-19-2008, 07:16 AM
Use a GOOD tire pressure gauge once a week.