NOTE:
“iPod” is a registered trademark of Apple Inc. in the United States and other countries.
Outline
An Auxiliary jack/USB port unit has been adopted which can connect to commercially-available portable audio/USB devices/iPod, and output sound from the speakers via the audio unit.
A USB adaptor has been adopted for transmission of information between a USB device connected to an exterior input unit and the audio unit.
Structural view

Block diagram
With audio unit (without display)

With audio unit (with display)

Audio Pilot®2 Microphone Removal/Installation
Audio UnitAdd-On Non-Genuine Parts and
Accessories
Non-genuine parts and accessories for Mazda vehicles can be found in stores.
These may fit your vehicle, but they are not approved by Mazda for use with
Mazda
vehicles. When you install non-genuine parts or accessories, they could affect
your vehicle's
performance or safety systems; the Maz ...
Glass Antenna
Purpose, Function
4SD
The AM/FM radio waves and RDS-TMC (Radio Data System-Traffic Message Channel)
radio waves are converted to an electrical signal and the signal is sent to
the audio unit.
5HB (With audio unit (with display))
The RDS-TCM (Radio Data System-Traffic Mes ...
Oil Cooler Removal/Installation [Mzr 2.0, Mzr 2.5]
WARNING:
Hot engines and engine oil can cause severe burns. Turn off the engine and
wait until it and the engine oil have cooled.
A vehicle that is lifted but not securely supported on safety stands is dangerous.
It can slip or fall, causing death or serious injury. Never work ...