I installed the Grom VL2 on my 2014 LC and it works great! I've had it now for about a month and everything works to include all the original factory functions. I think the 2013-2015 are pretty much the same, so I would think it should work well for you. The installation was pretty straight forward, especially if you watch some of the videos mentioned on this thread, but it wasn't without a hitch. Here's what I could add to some of the things already mentioned on this forum.
1. The installation manual isn't specific for the Land Cruiser, but for a Lexus. However, it's pretty similar, so not that much of an issue. Unfortunately, after install, I had the same issue as jeep2cruiser with audio quality. As he stated (and I confirmed this with Grom) the 16 pin OEM connector that you disconnect from the headunit should not be "daisy chained" into the Grom wiring harness. Only the new 16 pin connector from the Grom harness should be connected. All the other connections should be made as per the installation manual. This might save you the trouble of having to do the installation twice like I had to do!
2. I also experienced a loss of the backup camera video for a bit. It worked fine after install testing, but after I tucked cables in and put trim pieces on, I lost the video signal for all the cameras. After disassembly and checking all the connections, it started working and has not been an issue since. I checked with Grom and they only said to check the connection and that the VL2 unit does not interfere with the backup camera operations. I couldn't identify which connection caused this, but I don't think is was on the Grom unit, but some wiring either to the right of the headunit or under the glovebox...good luck!
3. After the initial power up initialization of the unit, the screen came up as described in the manual, but then it would "blink" for lack of a better description, which was a bit concerning. This continued for a while and eventually stopped. This has not been an issue since.
4. The unit came with the latest firmware which included the ability to connect Apple CarPlay wirelessly. Great feature, but it might have some glitches. My phone automatically connects to the unit on start up, which is nice, but I've experienced an issue of no audio. I have to de-select the IPhone connection on the display and then tap to re-connect to get it to work with the audio. I'll think I'll let Grom know to see if this could be a future firmware fix.
5. For navigation audio to work, you have to have your phone paired via bluetooth. This was also a bit frustrating, but fortunately jeep2cruiser cleared that up for me (much appreciated!).
6. The audio volume is somewhat dependent on the OEM volume. In other words, if you have your volume turned way down on the car radio/SAT/disc/etc, when you go to AUX to get to the Grom/CarPlay screen, your volume will also be very low, even if you turn the volume up while you're in AUX. Once you have the volume up in any of the other factory modes, this is not an issue and the volume and sound quality are great.
7. Last thing...if you decide to install a micro SD card, the manual says that you can put in up to a 128G card. The problem is that it has to be formatted in FAT32 which typically isn't supported for SD card above 32G. Also, WAV audio file aren't supported so only MP3s worked for me. Just make sure you install the card straight in otherwise it might go below the card slot and into the body of the unit (seems to like to go in at an angle when you first try to put it in).
Nice thing about the Grom unit is that it's nearly OEM. I've looked at Chinese and Australian units, and this is as close to "plug and play" as I think you'll get. I think it's a great product and well worth the asking price, but cheeper is always better, so good luck with the group buy! Hope this helps!
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