Motorola RAN4031-RDX UHF Antenna 6" for RDU 4100/4160D
UHF Band • 6" Whip • RDX Series • Genuine Motorola Part • RDU4100 & RDU4160D Only
The Motorola RAN4031-RDX is a 6-inch UHF replacement antenna built specifically for the Motorola RDX-series RDU4100 and RDU4160D business two-way radios. It is the genuine full-length whip that restores reach and signal clarity on a radio with a worn, bent, or missing antenna — a simple, screw-on fix that keeps your business radio fleet running at full performance.
Who It's For
Choose the RAN4031-RDX if you run UHF RDU4100 or RDU4160D radios and need the standard 6" full-length whip for maximum range. Working indoors in tight quarters? A shorter stubby antenna is the low-profile alternative — not sure which fits your unit, call 1-800-984-1534 or contact our Canadian radio experts before ordering.
Key Features
Full-Length 6" UHF Whip
The standard 6-inch UHF antenna delivers full range and signal strength for the RDU-series radio it is built for.
Genuine RDX Replacement
An authentic Motorola RAN4031-RDX part — the right fit and tuning for the RDU4100 and RDU4160D, with no guesswork.
Tool-Free Install
Screws directly onto your RDU radio in seconds — restore a damaged or missing antenna without sending the unit out for service.
Keep Fleets Running
Stock spares so a bent or broken antenna never sidelines a radio — a low-cost way to protect uptime across a whole team.
Compatible Radios
The Motorola RAN4031-RDX is compatible with these Motorola RDX-series business radios only: RDU4100 and RDU4160D. It is a UHF-specific antenna — do not fit it to VHF or non-RDX models. If you are not certain your radio is an RDU4100 or RDU4160D, confirm before ordering by calling 1-800-984-1534 or reaching out through our contact page.
Looking for the radios these antennas serve, or building out a UHF fleet? Browse our full range of commercial two-way radios and business two-way radios.
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Frequently Asked Questions About the Motorola RAN4031-RDX
• Which radios does the Motorola RAN4031-RDX fit?
The Motorola RAN4031-RDX is a 6-inch UHF replacement antenna for the Motorola RDX-series RDU4100 and RDU4160D business radios only. It is not designed for VHF radios or other models.
• Is the RAN4031-RDX a genuine Motorola part?
Yes. The RAN4031-RDX is a genuine Motorola RDX-series antenna, tuned and built for correct fit and signal performance on the RDU4100 and RDU4160D.
• How long is the RAN4031-RDX antenna?
The RAN4031-RDX is the full-length 6-inch UHF whip antenna. The 6-inch length gives you maximum range and signal strength for your RDU-series radio.
• How do I install the RAN4031-RDX?
The RAN4031-RDX screws directly onto a compatible RDU4100 or RDU4160D radio — no tools required. It is a quick replacement for a bent, worn, or missing antenna.
• How do I confirm the RAN4031-RDX is right for my radio?
Check that your radio is a Motorola RDU4100 or RDU4160D, the only models this antenna fits. If you are unsure, call our Canadian radio experts at 1-800-984-1534 or use our contact page to confirm before ordering.
