Garmin GTX 335 ADS-B Out Transponder with GPS, Encoder, and USB Charger


Availability: In stock

Product ID: 5960A

A complete ADS-B kit at an incredible price

This new kit adds a Garmin altitude encoder and a Garmin high-speed USB port multicharger (more than $300 in value) to the GTX 335 with GPS with a GA 35 WAAS antenna bundle. It’s an affordable, easy-to-install upgrade that offers a new transponder and 2020 mandate compliance.


Get ADS-B Out compliant

The FAA’s January 1, 2020 deadline for equipping with ADS-B Out is fast approaching, and Garmin’s GTX 335 is a...

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A complete ADS-B kit at an incredible price

This new kit adds a Garmin altitude encoder and a Garmin high-speed USB port multicharger (more than $300 in value) to the GTX 335 with GPS with a GA 35 WAAS antenna bundle. It’s an affordable, easy-to-install upgrade that offers a new transponder and 2020 mandate compliance.


Get ADS-B Out compliant
The FAA’s January 1, 2020 deadline for equipping with ADS-B Out is fast approaching, and Garmin’s GTX 335 is an easy-to-install option. This affordable, all-in-one solution is a great upgrade for your old transponder featuring a solid-state design that includes ADS-B Out and a built-in WAAS GPS. 



  • Complete ADS-B Out solution that satisfies the FAA mandate
  • 1090 MHz transponder works at any altitude and around the world
  • Built-in WAAS GPS means nothing extra to buy
  • Easy upgrade for an older transponder; fits in 1.65” slot
  • Push button code entry and digital information display
  • Includes GPS antenna
  • Includes altitude encoder


The inside track to ADS-B Out

The IFR-certified GTX 335 looks and operates like a standard Mode S transponder. It fits in the same 1.65-inch high slot in your avionics stack. It boasts a digital display, a pressure altitude readout, and dedicated pushbuttons numbered 0-9 for quick and easy squawk code entry. Plus, it’s an all solid-state design, which makes for lower power consumption and enhanced reliability, compared to earlier-generation transponder technology. What’s more, the addition of 1090 MHz ADS-B “Out” transmission capability (using precise GPS-referenced positioning information) enables the GTX 335 to automatically output more accurate, and more useful, traffic surveillance data to ATC – including aircraft flight ID, position, altitude, velocity, climb/descent, and heading information. Conventional Mode S and Mode C transponders can only broadcast altitude and squawk code – which means they require ground-based radar to correlate and identify the aircraft’s position on the controller’s radar screen.


Altitude encoding made simple

In addition to its WAAS-enabled position reporting capabilities, the GTX 335 can also be paired with the included Garmin altitude encoder to satisfy data transmission requirements for IFR. As opposed to other transponders with altitude encoding built in, the Garmin altitude encoder mounts separately on the install rack. So, should the transponder ever require removal, there’s no need for the static line to be disconnected. Which, in turn, eliminates the need for a follow-on leak check, and thus helps minimize ongoing service costs.


Improved ADS-B traffic
By adding ADS-B Out to your airplane, you’ll trigger a full traffic report from ADS-B ground stations. Using a portable ADS-B receiver and a tablet, you’ll then be able to see the position of nearby traffic, as well as their speed, altitude and track. So in addition to meeting the mandate, the GTX 335 can make your portable traffic display much more powerful.


  • Physical dimensions (unit, rack, connectors); for panel mounts, depth is measured from face of instrument panel: 1.68” x 6.30” x 10.07” (42 x 160 x 256 mm)
  • Display type: Digital
  • Weight (unit, rack, connectors)  2.8/2.9 lbs (1.27/1.32 kg)
  • Voltage range: 14/28 VDC (15/17 W Max)
  • Transmit power: 200 W minimum
  • Temperature: -40° C to +70° C
  • Operating altitude: To 55,000 ft (16,800 m)
  • Cooling input: Not required
  • Environmental compliance (TSO Approved): DO-160G
  • Software compliance (TSO Approved): DO-178 Levels B, C, D
  • Hardware compliance (TSO Approved): DO-254 Level C; TSO compliance (Approved): "TSO-C88b (w/opt. alt. encoder); TSO-C112e (Class 1, Level 2els); TSO-C166b (Class B1S)"
  • Mount type: Panel
  • Transponder type: Mode A/C, S and ES
  • Squawk code selection: Push-button
  • Traffic Information Services (TIS) alerts compatible: Yes
Transponder features:
  • Solid state transmitter (more efficient, longer life) Yes
  • Aural alerts: Yes
  • Total Air Temperature (TAT): Yes
  • Pressure altitude readout: Yes
  • Altitude monitor function: Yes
  • Density altitude readout: Yes
  • Built-in timers: Yes
  • Automatic ALT/GND mode: Yes
  • 1090 MHz ADS-B Out: Yes
  • Built in GPS/WAAS receiver: Optional
  • Displays on G500/G600, GTN 650/750, GNS 430W/530W, and others: Yes
  • Pressure altitude encoder module (mounts to connector backplate): Optional
  • Night vision compatible: Optional


AML STC allows for installation in hundreds of aircraft makes and models. Requires avionics shop for installation.


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GTX 335 Pilot's Guide

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Eric Carnahan

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3.5 / 5.0
2 Reviews
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Would You Recommend?
Great new toy!
Love it! What a great upgrade and now I’m legal for January 2020
October 24, 2019
10 months ago
2 / 5
2 / 5
1 / 5
Ease Of Use
2 / 5
3 / 5
Would You Recommend?
Great install...horrible experience with final product use
Installed gtx-335, as an A&P, the install was very strait forward. Configuration of menu came with help from an authorized Garmin shop. Do all the reading you want it wont get you past kissing the dealers ace. Three flights and still no pass with the FAA. Guessing, which is not what you are supposed to do with anything aircraft oriented, the software already needs updated. Nightmare! Definatly not near as easy as the install!
June 2, 2019
Question and Answer
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 15 questions Browse 15 questions and 15 answers
Is this price without installation?
A shopper on Feb 4, 2019
BEST ANSWER: Yes, that is correct.
Does this Garmin GTX 335 kit come with a wiring harness?
William B on Nov 8, 2019
BEST ANSWER: It includes the connectors. The install shop provides the wires.
Is it a direct slide in replacement for a King 76A?
Steven N on Feb 4, 2019
BEST ANSWER: It will fit in the same space. it is not a direct replacement.
I have a GTX 330. Will this just plug in or do I need to have wiring done from an avionics place?
A shopper on Aug 22, 2019
BEST ANSWER: The 335 will not plug and play. There are several options depending on the avionics in the aircraft.

Do you have and WAAS GPS in the aircraft?

The 330 is also able to be upgraded to an ADS-B out unit.
Does the Garmin GTX system come with the temperature sensor?
A shopper on Aug 14, 2019
BEST ANSWER: No, it does not have a temperature sensor.
How does the USB charger fit into this picture? It looks like it's just a simple charger that plugs in to a cigarette lighter.
A shopper on Jun 26, 2019
BEST ANSWER: You are correct. It plugs into the cigarette lighter.
I'm looking at Combining the Area 660 and GDL 50 I already have with the GTX 335 to have a full ADS-B In/Out system. How does the GTX 335 integrate with the Area 660 / GDL 50, or does it?
Ronald D on Apr 10, 2019
Garmin GTX 335 ADS-B Out Transponder with GPS, Encoder, and USB Charger
Garmin GTX 335 ADS-B Out Transponder with GPS, Encoder, and USB Charger
Garmin aera 660 GPS (Americas)
Garmin aera 660 GPS (Americas)
Garmin GDL 50 ADS-B Receiver
Garmin GDL 50 ADS-B Receiver
BEST ANSWER: The GTX 335 does not integrate with the GDL-50/Area 660. However, if you have the GTX 335, you'll get a complete traffic picture via the GDL 50. So while it's not a fully integrated system, all three parts would work together very well.
What airplanes are approved for this model ADS B?
James W on Mar 15, 2019
BEST ANSWER: The STC list is available at Most GA aircraft are included.
Will display to I Pad fore flight? GTX335
Dave H on Mar 8, 2019
BEST ANSWER: The transponder is ADS-B OUT. You will need an IN receiver to receive the weather and traffic.
Is it a slide in replacement for any existing panel mounted transponder?
KURT K on Feb 28, 2019
BEST ANSWER: It will slide into the existing slot. It is not a slide in replacement.
Can an individual with a repair lisence for his homebuilt RV 7 install this equipment and also receive the Gov. rebate??
Harry D on Feb 25, 2019
BEST ANSWER: Yes, you can install this in your RV7.
What modifications are necessary, to replace gtx327? I know gps antenna. Does the 327 wiring harness just plug into 335? Or wiring harness needs to be changed or modified?
Warren B on Feb 24, 2019
BEST ANSWER: The wiring harness will also need to be changed/ modified. I would recommend talking to your avionics shop for details.
The GTX 335 has GPS installed - will an Ipad pick up the GPS signal from this unit or will I still need the Bad Elf GPS?
Lloyd K on Feb 13, 2019
BEST ANSWER: The GPS that is installed in the GTX 335 is only for ADS-B position, It will not be sent to the iPad.
Does this have to be installed by a garmin dealer or can it be installed by an IA and then certified by an appropriately rated repair station?
Christopher M on Feb 8, 2019
BEST ANSWER: It can be installed by an AI and then certified.
What extras are needed? Mounting tray? Harness? What is the cost for those extra installation items for the GTX335?
Charlie H on Feb 6, 2019
BEST ANSWER: The GTX 335 includes the unit, tray, air data encoder and wiring connectors. The Install shop will supply the wires. No extras are required.
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