CarCareTruth Score
Decent.
Opens Amazon in a new tab. No account needed to look.
Saved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate I earn from qualifying purchases. Full disclosure
Prices may varyThis product ranks #2 of 7 in Tire Pressure Monitor (TPMS).
Last reviewed June 14, 2026
TL;DR One community reference-gauge cross-check shows readings within ±1 PSI; no independent corroboration was found, so accuracy is provisional. No community follow-up data on long-term sensor battery life was found at time of review; the manufacturer rates CR1632 cells at up to 2 years.
The M12-3 is a 6-sensor external-cap TPMS aimed at RV and trailer owners who need the included RF repeater to bridge the distance to rear axle sensors. FCC Part 15 certification is verified in the fcc.gov database (ID 2BDGI-TS, Shenzhen Huatai Electronics, granted 2023-12-18). One community owner cross-checked all four positions against an Astro gauge at 38 PSI and found a perfect match. The repeater is confirmed reliable on trailers up to 38 feet. One documented design limitation: signal loss does not trigger a timely alarm · Tymate confirmed this is normal behavior · leaving drivers unaware of a dropped sensor for up to 90 minutes.
Best fit for RV and multi-axle trailer owners who need extended sensor range and want a driveway-installable system without shop visits. The simultaneous 6-tire display and 5 alarm modes cover typical trailer monitoring needs. Skip it if reliable loss-of-signal alerting is a priority · the system will not alarm promptly when a sensor stops communicating. Passenger-car owners who only need 4 sensors will find more targeted options at lower price points.
FCC Part 15 certification for the sensor transmitter is verified at fcc.gov (ID 2BDGI-TS). No AC charger is included; the display charges via solar panel, 12V cigarette lighter, or USB, so no third-party charger certification concern applies. No active CPSC recall as of 2026-05-22. The internal display battery and CR1632 sensor cells should be disposed of at a Call2Recycle drop-off location or municipal household hazardous waste · not in household trash.
Marketing copy from Tymate, via Amazon. Not editorial.
Weekly pick
One product, one safety verdict, every week. No spam.
TireMinder
i10 RV TPMS with 4 Transmitters
TST (Truck System Technologies)
507 Series TPMS · 4-Sensor Cap Kit with Color Display
VESAFE
Wireless Tire Pressure Monitoring System with Full-Color Real-Time Display
Autel
MX-Sensor 315MHz + 433MHz Dual Frequency TPMS Sensor (4-Pack)
As an Amazon Associate I earn from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.