Looking for Replacement O-Rings for TST Cap Sensors

Question

Question:

I have tst cap sensors on my truck and fifth wheel. These amount to 8 sensors. I am looking for o ring replacement kits that supply o ring where battery goes and gasket for the valvle stem area. Do you carry kits for both of those items. If so please supply information for ordering. Thanks, Jeff Fowler

asked by: Jeff F

0

Expert Reply:

Hey Jeff, we have a replacement o-ring kit for the TST cap sensors with the part # TST39FR. This would be what you are looking for. Are yours leaking?

expert reply by: Jameson C

0

Jeff F.

5/29/2026

No, but they are getting old and just replacing for maintenance. Thanks for the info.

Jameson C.

6/1/2026

@JeffF glad to help!

Answer 1

Hey Robert welcome back! The Replacement O-ring Kit for TST SE2 Cap Sensors item #TST39FR has 11mm x 1mm O-rings. These are designed as replacements for the SE2 Cap Sensor for TST 507 Series item #TST47FR. If you have any additional questions, go…

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Answer 2

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The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 6

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 7

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Answer 8

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Answer 9

To replace the batteries of the TPMS Cap sensors included with the TST TPMS for RVs - Color Display - Signal Booster - 6 Tire Sensors #TST-507-RV-6-C you will need to use the included wrench to turn the nut on the sensor counter clockwise. That will…

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Answer 10

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Answer 11

Hey Adam, we have the replacement SE2 cap sensor part #TST47FR that will work with what you have and is pretty small so it wouldn't stick out far enough to cause you any issues or problems with curbs. These are sold individually too so you…

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Answer 12

Hello Gary, thanks for reaching out. It is rare, but I have heard of the O-rings giving out and causing the sensors to leak. If this is the case with your sensors, then yes, the Replacement O-Rings #TST84FR are exactly what you need to fix the issue.…

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Looking for Replacement O-Rings for TST Cap Sensors

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