Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) — Specs & Fitment
Operating at 315 MHz with an ID67 transponder chip, the Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) serves as both a mechanical ignition key and a wireless remote for select Toyota vehicles spanning the mid-2000s through mid-2010s. This unit features a four-button layout on its integrated remote housing and carries a TOY43 blade profile machined into the key shank. Inside the fob sits the ID67 transponder element responsible for immobilizer authentication each time the key is inserted into the ignition barrel. Compatible vehicles share Toyota’s older transponder architecture that preceded the transition to proximity-based smart key systems. A correctly cut and enrolled Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) will start the engine and operate door lock, unlock, trunk release, and panic functions wirelessly at 315 MHz.
Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) Technical Breakdown
The remote head key form factor combines a traditional mechanical blade with an integrated RF transmitter and transponder in a single housing. Unlike separate key-plus-fob setups that were common in earlier Toyota models, this design consolidates everything the driver needs into one device. The TOY43 keyway is a high-security profile used across many Toyota platforms from this era, and it requires either a code-cut from bitting data or careful duplication from an existing working key using appropriate key machines equipped with Toyota-specific jaw sets.
The four buttons typically correspond to lock, unlock, trunk release, and panic. The remote operates on a 315 MHz carrier frequency, which is the standard band for North American-market Toyota keyless entry remotes from this generation. The FCC ID GQ4-29T is registered for this frequency and button configuration, and it should be verified against the existing OEM remote’s FCC label before ordering a replacement to confirm compatibility.
ID67 Transponder and Immobilizer Pairing
The ID67 chip embedded in the key head communicates with the vehicle’s immobilizer ECU through a passive RFID exchange. When the key is turned in the ignition cylinder, the immobilizer antenna ring energizes the transponder, which responds with its stored cryptographic credentials. If the ECU recognizes the transponder as a registered key, the fuel injection and ignition systems are enabled. If the credentials do not match, the engine will crank but not start.
Programming an ID67-based key into Toyota’s immobilizer system can often be accomplished through an on-board procedure if at least one master key is available. The typical sequence involves cycling the ignition between the ON and OFF positions a set number of times within specific time windows, then inserting the new key to register its transponder. When no working keys are available, a professional automotive locksmith or dealer with diagnostic equipment capable of communicating with the immobilizer module is required to register the device. The remote portion — lock, unlock, trunk, and panic — generally requires a separate programming routine, which is also achievable through an on-board button-press sequence on most of the compatible models.
Validated Vehicle Fitments
The following Toyota models have been validated for use with this key, based on their shared immobilizer platform and 315 MHz remote architecture:
- Toyota Avalon (2005–2012) — Full-size sedan; uses TOY43 keyway and ID67 transponder throughout this generation.
- Toyota Corolla (2006–2013) — Compact sedan covering the tenth generation (E140/E150); same mechanical and electronic key specifications.
- Toyota Venza (2009–2015) — Crossover wagon; first-generation models equipped with traditional key ignition rather than push-button start share this key profile.
Locksmiths and vehicle owners should note that some higher-trim variants of these models were optionally equipped with smart key proximity systems, which use an entirely different key type. The remote head key applies only to vehicles with a physical ignition cylinder. Verifying the existing key’s FCC ID against GQ4-29T before ordering is the fastest way to confirm fitment.
TOY43 Blade Cutting and Duplication
The TOY43 blade is a flat, laser-style profile with cuts on one edge. It is not a sidewinder or internal-cut design, which makes it compatible with a broad range of code-cutting and duplicating machines. When cutting from code, the bitting information can be retrieved from the vehicle’s lock cylinders using Toyota-specific decode tools or, in some cases, from dealer records tied to the VIN. Aftermarket key blanks branded under Bosma Enterprises use the same dimensional tolerances as OEM blanks, ensuring proper insertion depth and turn clearance in the ignition and door cylinders.
A precision cut matters not only for mechanical operation but also for proper transponder alignment. If the blade is cut too shallow or too deep, the key may not seat fully in the ignition cylinder, placing the transponder chip outside the optimal read range of the antenna ring. This can cause intermittent no-start conditions that mimic a transponder fault when the actual issue is mechanical.
OEM vs. Aftermarket Considerations
The Bosma-branded version of this remote head key is an aftermarket alternative to the Toyota OEM part. For vehicle owners, the primary advantage is cost — aftermarket units with the same FCC ID, transponder type, and blade profile are typically a fraction of the dealership price. For locksmiths, stocking aftermarket remote head keys under FCC ID GQ4-29T allows coverage of three popular Toyota models across nearly a decade of production years with a single SKU.
Quality considerations include the durability of the plastic housing, the tactile response of the four buttons, and the long-term reliability of the internal circuit board. Because the RF and transponder specifications are functionally identical to the OEM counterpart, programming procedures do not differ. The key either registers and works or it does not — there is no partial compatibility.
When to Contact a Professional Locksmith
If a working master key is still available, many Toyota owners can complete the transponder registration and remote programming themselves using the on-board procedures documented in the owner’s manual or widely available online. However, situations involving worn ignition cylinders, damaged wafers, or the need for code-original cutting call for professional service. An automotive locksmith equipped with the appropriate key machine, decoder, and diagnostic tools can originate the blade from code, register the transponder, and program the remote functions in a single service call — often at the vehicle’s location.
Specifications and fitment
| Key type | Remote Key |
|---|---|
| Transponder chip | ID67 |
| Button count | 4 |
| Frequency (MHz) | 315 |
| Keyway | TOY43 |
| FCC ID(s) | GQ4-29T |
| Region(s) | USA |
| Product type | Remote Head |
| Compatible makes | Toyota |
Listed vehicle fitment
| Make | Model | Years |
|---|---|---|
| Toyota | Avalon | 2005–2012 |
| Toyota | Corolla | 2006–2013 |
| Toyota | Venza | 2009–2015 |
Fitment must be confirmed against the existing key’s FCC ID family and the vehicle’s exact configuration before cutting or programming. VIN or photo verification may be required.
Questions and answers
Which vehicles does Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) fit?
Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) is listed to fit Toyota applications such as Toyota Avalon, Toyota Corolla, Toyota Venza. Confirm the exact year range and the existing key’s FCC ID family before ordering, since fitment can vary by trim and region.
Does Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) need programming?
Yes. Because it carries a transponder/remote function (chip ID67), it must be programmed (paired) to the vehicle’s immobilizer and, for remote functions, to the keyless-entry system. Many vehicles also require at least one working key to add a new one.
Does the blade need to be cut?
Most Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) units ship uncut and require automotive key cutting before they will turn the ignition or door lock. Cutting establishes the mechanical match; programming establishes the electronic match — both are needed.
Is Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) OEM or aftermarket?
This listing is an aftermarket-grade replacement intended to match the original key’s electronic and mechanical specification. It is not required to carry a vehicle-brand logo and should be matched by FCC ID family and chip type rather than by appearance.
Check Fitment and Key Help
Low Rate Locksmith, a mobile automotive locksmith, can confirm whether Bosma 4-Button Remote Head Key (FCC ID GQ4-29T) matches an existing FCC ID family and coordinate cutting and programming when the vehicle configuration requires professional service. For dispatch and support, call (833) 439-8636 or email info@lowratelocksmith.com.
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