Looking to buy a 2009 Alphard but I want to be about to install a English head unit and have all the OEM features. The 2009 I'm looking at has the 270 camera and 4 speakers in the headliner. Which Oem stereo system is it equipped with? Amplified? From the pictures I seen of the interior there are only 4 speakers in the headliner maybe a 5th.

Will it be simple headunit swap or will I need a canbus box and wiring diagrams and splicing of wires to get a head unit to work?

The confusion arises because some imports are actually 'export' models from Hong Kong.

Are you sure it's just 4 in rooflining? If it's the 18 speaker system, there are 6 in the roof, 2 in rear and 4 between the two sunroofs ( these 4 near the front can have split audio sources, eg, radio/bluetooth for the front passenger and driver, and the rear 4 roof speakers outputting cd/dvd for the rear passengers.

The base model has 8 speakers, the super live has 11 speakers and the premium has 18 speakers.

The 11 spk has an amplifier under passenger seat.

The 18 spk has a larger amplifier under passenger seat and a subwoofer under drivers seat.

The 270degree camera has an IPA (intelligent parking assist) ECU under passenger seat, that takes inputs from the sonar, and the additional two side sensors on the front bumper.

The front and side cameras connect via this ecu.

can you see if tweeters are fitted on the sliding doors? They are located near on the front trim of the windows.

In any case, your headunit model suggests an external amplifier.

You can buy an adapter that converts an analogue output signal from an aftermarket headunit into a digital signal the amplifier understands., and therefore retain the amplifier and existing speaker wiring.

I can share the block diagrams and wiring schematic for the ipa and headunit

Pretty sure there's only 4 speakers in the roof. No sunroof on this vehicle. Vehicle is currently in Yokohama Japan. There looks to be tweeters in the sliding door. So this is the super live system I assume.

Hard to see as I only have pictures from the selling website.

Thanks

Yes. Some of the non sunroof utilise a different design speaker in the roof.

This must be an 18 speaker system.

The amplifier is a 16 channel 640watt (16x40 watt) system, and a separate active powered subwoofer.

Ok. So would there be a easy plug and play solution for a replacement headunit that had Android auto/apple car play and still have a function 270 camera and the park assist sonar?

Would this OEM head unit have Bluetooth as well?

Ok, great thanks.

I use a android auto/carplay external box that connects via the aux video input and the oem Bluetooth for audio.

Less than £200, if you fit yourself. You open up the screen and add a connector to the touchscreen.

The rest of it is plug and play.

This means you retain all original functionality, with the added functions of android/apple system.

If you want to go aftermarket headunit, you will need a MOST decoder box for the connection to the amplifier, and a gvif adaptor for the cameras.

Although you will be able to see the 270 cameras on an aftermarket headunit, i don't think the auto parking will work because you won't be able to interact with the onscreen interface, the video freed will be essentially 'dumb', whereas using a box like i do, you still have full use of the IPA system ( to be honest, you'll probably never use auto park, because it's quicker to just use the cameras as an aid and do the steering manually)

If you go on to AliExpress, and search for Toyota alphard MOST adaptor/interface, you'll find dozens of listings for the wiring harnesses

Here's the block diagram for the headunit.

Do you have a link for the external carplay box that you use? Maybe that's the easiest way.