Lear Remote Key Fob GQ43VT18T – 315 MHz Chrysler Dodge Remote

Programming a Lear Remote Key Fob (FCC ID GQ43VT18T) to a compatible Chrysler or Dodge minivan requires entering the vehicle’s onboard programming mode within a specific timing window. The procedure typically begins by cycling the ignition between RUN and OFF positions while holding the UNLOCK button on the driver’s door panel, then pressing any button on the fob to register the signal. Locksmiths enrolling this remote must confirm the vehicle acknowledges the 315 MHz transmission before completing the sequence. A Lear Remote Key Fob (FCC ID GQ43VT18T) enrolled correctly will trigger an audible chime or door-lock cycle to confirm pairing. Replacement units of this device are readily sourced in the aftermarket, though verifying the correct FCC ID — GQ43VT18T — is essential to ensure signal compatibility with the receiver module.

Lear Remote Key Fob (FCC ID GQ43VT18T) – Technical Overview

Manufactured by Lear Corporation, the GQ43VT18T is a keyless entry remote that operates on a 315 MHz radio frequency, the standard frequency band used across numerous North American-market Chrysler Group vehicles from this era. The fob communicates with the vehicle’s RF receiver module — typically mounted inside the cabin near the instrument panel — using a rolling-code protocol to prevent unauthorized replay attacks. Each time the remote sends a lock or unlock command, the code advances in a pseudo-random sequence that both the fob and receiver track independently.

This remote does not contain an integrated transponder blade or smart-key electronics. It functions strictly as a radio-frequency keyless entry transmitter, separate from the mechanical ignition key. Vehicle owners should note that replacing the fob does not affect the transponder immobilizer system, which is governed by the physical key inserted into the ignition cylinder. The two systems — keyless entry and engine immobilizer — operate on independent hardware.

Vehicle Fitment and Compatibility

The GQ43VT18T remote is validated for the following Chrysler and Dodge minivan platforms:

• Chrysler Town & Country — model years 2001 through 2007
• Chrysler Voyager — model years 2000 through 2007
• Dodge Caravan / Grand Caravan — model years 2001 through 2007

All three nameplates share the same minivan architecture during this production window, which is why a single FCC-registered transmitter covers the range. When sourcing a replacement unit, matching the FCC ID printed on the back of the original remote is the most reliable way to confirm compatibility. Other Lear Corporation remotes may look physically similar but operate under different FCC registrations with different rolling-code algorithms or button configurations.

Onboard Programming Procedure

One advantage of the GQ43VT18T is that it supports onboard programming on most of the vehicles it fits, meaning a diagnostic scan tool is not strictly required for enrollment. The general self-programming sequence for these Chrysler and Dodge minivans is as follows:

1. Enter the vehicle and close all doors. Insert the ignition key and leave it in the OFF position.
2. Press and hold the UNLOCK button on the driver’s door panel.
3. While holding UNLOCK, cycle the ignition to RUN (do not start the engine) and back to OFF. Repeat this cycle three times, ending in the RUN position on the final cycle.
4. Release the UNLOCK button on the door panel. The door locks should cycle once, indicating that the receiver module has entered programming mode.
5. Within 30 seconds, press and release any button on the Lear Remote Key Fob (FCC ID GQ43VT18T). The door locks will cycle again to confirm enrollment.
6. If programming additional remotes, press a button on each additional unit within 30 seconds of the previous enrollment chime.
7. Turn the ignition to OFF to exit programming mode.

If the door locks do not cycle in step four, the timing was likely off. Repeat the entire sequence from the beginning. On some model years or trim levels, slight variations in the number of ignition cycles may apply — locksmiths working across the full 2000–2007 range should verify the specific protocol for each year. Failed attempts do not lock out the receiver, so the procedure can be retried immediately.

Battery Replacement and Maintenance

The remote housing is held together by a small Phillips screw or clip, depending on the production run. Inside, the unit uses a standard coin-cell battery — commonly a CR2032, though the exact cell should be confirmed by inspecting the original. When replacing the battery, avoid touching the circuit board contacts with bare fingers, as skin oils can degrade conductivity over time. After battery replacement, the fob does not need to be reprogrammed; the rolling-code synchronization is stored in non-volatile memory and survives power loss.

If the remote’s range has noticeably decreased — working only at very close distances — the battery is the first thing to check. A weak cell reduces the 315 MHz signal strength below the receiver’s sensitivity threshold well before the fob stops functioning entirely. Replacing the battery typically restores full operating range, which on these vehicles is roughly 30 to 50 feet under open-air conditions.

OEM vs. Aftermarket Considerations

Original-equipment units bearing the Lear Corporation branding and the GQ43VT18T FCC ID are available through dealership parts departments, though aftermarket alternatives matching the same FCC registration are widely circulated. For locksmiths, the critical verification point is confirming the FCC ID and frequency. An aftermarket remote that matches GQ43VT18T will use the same rolling-code algorithm and can be enrolled using the identical onboard procedure. Mismatched FCC IDs — even if the case looks identical — will fail to pair.

From a durability standpoint, OEM units from Lear Corporation tend to have tighter button-membrane tolerances and slightly better waterproofing around the battery compartment. Aftermarket units function identically in terms of RF performance but may exhibit looser button feel after extended use. For vehicle owners prioritizing longevity, OEM sourcing is the safer choice; for cost-conscious replacements, aftermarket units with the correct FCC ID are functionally equivalent.

When to Contact a Locksmith

While the self-programming procedure is accessible to most vehicle owners, there are scenarios where professional assistance is warranted. If the onboard programming sequence consistently fails — door locks never cycle to acknowledge programming mode — the RF receiver module itself may be faulty. A locksmith or automotive electronics technician can diagnose receiver issues using a frequency detector to verify whether the fob is transmitting on 315 MHz. Additionally, if the vehicle has had its body control module (BCM) replaced or reflashed, the onboard programming sequence may be disabled, requiring scan-tool-based enrollment instead.