Alpine Siege | 100 Series HVAC Controller - NAV DELETE - (OEM+)

[Anarchy]

ALPINE SIEGE 100 SERIES HVAC CONTROLLER​

Web: Alpine Siege — Pre-launch - https://alpinesiege.com
Instagram: Instagram - https://instagram.com/AlpineSiege
Facebook: Alpine Siege - https://facebook.com/AlpineSiege

Goal
Restore reliable, physical HVAC controls while allowing the owner to choose an audio/head-unit solution independently of the factory navigation display. The product is being developed around OEM-like behavior, clean fitment, reversible installation, and long-term automotive reliability. Detailed engineering and implementation information is intentionally not being published.

Development Vehicle
2006 Lexus LX470, US-market vehicle, build date 06/2005.

Current status (9/17/2026)

2006 LX470 - Fully validated (1100+ miles)
Prototype #1 - The development vehicle has completed extended real-world testing, including normal daily use in high ambient temperatures, repeated starts/stops, and continued HVAC operation without a reported controller failure.

2005 LX470 - Fully validated
Prototype #2 - has now been independently installed in a separate 2005 LX470 and is operating correctly. This provides important independent cross-model-year validation outside the original development vehicle.

2007 LX470 - Fully validated
Prototype #3 - independent installed in a separate 2007 LX470 and is operating correctly.

Next Targets:
2003 & 2004 LX470 validation.

Future Targets:
03-07 Toyota Land Cruiser NAV-equipped remain in scope. They will be validated separately rather than assumed to be identical to the LX470.

Alpine Siege 100 Series HVAC Controller Package

• Standalone HVAC controller/display assembly
• Vehicle-specific plug-and-play interface harness
• Vehicle-specific finished faceplate/trim solution
• Installation documentation

ORDER/WAITLIST/PRODUCTION
The original waitlist was created to measure demand, application mix, and beta-testing interest. It does not reserve a production position.
As of September 12, 2026, no customer preorder/payment has been accepted. When ordering opens, the production queue and payment terms will be announced separately.

PRICING
The previously discussed target was approximately $1,099 for a complete kit, but final production pricing should be treated as provisional until ordering officially opens.

 

[Anarchy]

Removed during thread cleanup. See Post #1 for current project information.

 

[Zuberg]

This is pretty neat, nice work! Following along in hopes you develop something as I'd be interested in a module for 06 LX470 (prod date 06 2006). I'm sitting on a middle east non nav kit but lacking the board(s) needed for later LX470.

Would be great if you could list the toyota part numbers for the boards you're testing.

 

[dchilds]

Though I can’t say I understand the details, have a general idea of where you’re heading with this and love the effort. I would love to do an “easier” nav delete on my ‘03 LX.

 

[Anarchy]

This is pretty neat, nice work! Following along in hopes you develop something as I'd be interested in a module for 06 LX470 (prod date 06 2006). I'm sitting on a middle east non nav kit but lacking the board(s) needed for later LX470.

Would be great if you could list the toyota part numbers for the boards you're testing.

Thanks! and yep, 06/2006 is one of the initial targets.

I’m testing against the A/C Amplifier - part number family 88650-XXXXX.

Though I can’t say I understand the details, have a general idea of where you’re heading with this and love the effort. I would love to do an “easier” nav delete on my ‘03 LX.

Appreciate it. That’s exactly the motivation here, make NAV delete easy & allow the use of any head-unit preference. Still proving a few things, but if this holds, I’ll definitely circle back on earlier LXs like the ’03.

I could see it looking something like this.. one of the examples is a VW retrofit with haptic touch feedback.

 

[Anarchy]

Removed during thread cleanup. See Post #1 for current project information.

 

[ndg]

I've got an early non-nav TLC, so no skin in this game, but I've got to applaud the work you're doing. Being on the official side of the fence for work I know how hard it can be reverse engineering network traffic.

 

[Formerjeeper]

I don't know what a lot of this means, but I have been planning to go the Teyes route and would much prefer this solution. I'll be eager to try this out on my 2005 LC when you have it fully figured out.

 

[Anarchy]

Thank yall for the support.

Just to be clear: this is not a quick-turn project & if you’re looking for a fast or inexpensive solution, this probably won’t be it.

If you want a clean, permanent NAV delete without sketchy screens or wiring hacks, this may be the solution.

More when there’s something worth posting

 

[Anarchy]

Removed during thread cleanup. See Post #1 for current project information.

 

[ScotyDosentKnow]

Still deep at the transport layer...

Bus is behaving more like a structured multiplex network so the focus lately has shifted from “finding commands” to validating packet structure, timing context, and acceptance conditions.

Isolated the frame families tied to blower transitions and confirmed repeatable OEM behavior. Current work is around why the HVAC ECU ignores injected sequences even when waveform and timing look correct.

No successful injection yet, but we’re past the guessing phase and into protocol validation.

This is proving to be a proper engineering project... 140 hours in.

Applaud you for diving into this. The head unit and HVAC controls are easily my least favorite thing about the 100 Series

 

[Sunman]

Ok, I'll bite.... what exactly are you doing here? Are you creating a way to separate the HVAC controls away from the head unit? Would you create a separate HVAC contoller that would fit in the radio slot? I hope so.... I have spent literally hundreds of hours going round and round trying to figure out which option will work for me, and pretty much all of them sound like they aren't that dependable. I don't like the Tesla style because it is too big; I'm not a big fan of using the controller behind the head unit because you are stuck with the stock really low res screen; I've even considered the "portable carplay monitors" to sit on the dash, but again pretty much all of them are from not well-known foreign factories with lots of conflicting opinions of their value. This would be a godsend for me. If this is what you are doing, the heater controller would be separate, and then a person could go with a head unit from Alpine, Kenwood, or Pioneer? Is that what I am gathering here? One of the criteria I want to add to the unit is to have a aux video input because I bought an infrared monitor from Robofinity and I thought it would be cool to tap the video input from it to the stock screen. As usual, I am always looking for something that no one makes. I'll be watching this thread and waiting on purchasing something.

 

[LJE]

This is outstanding! As someone with a 05 LX I'm super excited that that's exactly what you're starting with, hah!

Let me know if you'd like some help with the faceplate design/integration. More than happy to contribute whatever I can to this project.

 

[Coin]

As someone who loves their 03’ LX, if I had an option to ditch the T’eyes for hard hvac controls I would do it in a heart beat.

Please don’t make hvac controls a touch screen! Please please please!!

You could almost name your price.

 

[Anarchy]

Removed during thread cleanup. See Post #1 for current project information.

 

[Sunman]

As someone who loves their 03’ LX, if I had an option to ditch the T’eyes for hard hvac controls I would do it in a heart beat.

Please don’t make hvac controls a touch screen! Please please please!!

You could almost name your price.

agreed. Anxiously awaiting positive results.

 

[implayaz9]

Following this Thread.

 

[Jack90210]

Following

 

[cruiserbrett]

This is an amazing thread! I have an early LX470 without nav, just to avoid this problem. But this is going to cause me to buy a later truck with VVTi.

 

[imperium]

This sounds like a massive undertaking. We all appreciate the work you're doing!
I have a nav delete kit from overseas and haven't installed it yet- would that be compatible with what you're doing? Or would this be all custom controls?