TireMinder Brass TPMS Valve-Cap Transmitters 2-Pack for TMG400C/TM66/A1A — Low-Profile, CR1632

TireMinder 2-Pack Brass Transmitters are compact replacement TPMS valve-cap sensors designed to restore wireless tire pressure monitoring for TMG400C, TM66 and A1A systems.

These two brass transmitters let you quickly replace worn or missing TPMS valve-cap sensors on vehicles that use brass or stainless steel valve stems. They are engineered as low-profile screw-on units that behave like ordinary valve caps while sending real-time pressure data to compatible TireMinder monitors. Each transmitter houses a user-replaceable CR1632 battery and weighs roughly 0.5 ounces, making them unobtrusive but durable additions to RVs, trailers, motorhomes, trucks, and passenger cars.

How do these transmitters work with my existing TireMinder system?

The transmitters screw onto brass or steel valve stems and wirelessly broadcast tire pressure data to TireMinder receivers already paired with your system model (TMG400C, TM66 or A1A). They function as direct replacements for factory valve-cap sensors, requiring no additional adapters when used with compatible monitors.

• Compatible with TireMinder TMG400C, TM66 and A1A monitors
• Screws on like a standard valve cap for quick installation
• Pairs automatically when installed if previous sensor IDs match
• Operates on a CR1632 coin cell with a typical 9–14 month life

What materials and durability can I expect from these valve-cap sensors?

These transmitters are made to fit brass and stainless steel valve stems, with construction that resists everyday road vibration and weather. Their compact metal housing helps protect the internal electronics while keeping the unit light and unobtrusive.

• Designed for brass and steel valve stem applications
• Low-profile metal body resists impacts and elements
• Approximately 0.5 oz weight avoids affecting valve performance
• Replaceable battery simplifies long-term maintenance

How simple is installation and battery replacement?

Installation is straightforward — remove your old valve cap or transmitter and screw the new TireMinder transmitter into place. When the battery runs low, open the housing to swap in a CR1632 coin cell; typical battery life is between 9 and 14 months depending on use and environmental factors.

• Tool-free install: hand-tighten onto a valve stem like a cap
• Battery type: CR1632, widely available for easy replacement
• Lightweight design avoids the need for recalibration in most systems
• If pairing issues occur, consult your monitor’s re-learn or ID entry procedure

Who is this product for? These TireMinder brass transmitters suit owners of RVs, travel trailers, motorhomes, pickup trucks, and cars that use TireMinder TMG400C, TM66 or A1A monitors and have brass or stainless steel valve stems. They’re a practical pick for drivers who want a simple, low-profile way to replace lost or aging valve-cap TPMS sensors without professional installation. Ideal for people who prefer a compact solution with replaceable batteries and compatibility with a broad range of vehicles, these transmitters let you maintain wireless tire pressure monitoring with minimal fuss.