Already decided to finish the ETK section Audio, navigation, information systems
Subsection Radio Interference Suppression System

All details from this subsection are in the corresponding sections on the electrical equipment of the engine. Some of them I have already installed and some will be installed later. So now just a record for general information. All photos of details are from the Internet.
Part No. 1 - kit for suppressing obstacles (65 31 1 286 070). No longer available to order. It includes the "ground" busbars of the generator, and "ground" buses #3.

Part No. 2 - capacitor for suppression of generator interference (12 31 1 356 564). If you order it under BOSCH number 0290800036, its price will be much lower. I will write about it in the generator section.

Part No. 3 - hood "ground" bus (65 31 1 286 068) Already installed with the hood.


Part No. 3 - tire "ground" of the valve cover (65 31 1 286 069). Will be installed together with the motor.
Parts #4, #6 and #7 are some kind of package - "special protection against interference".
Part #4 - 0.47MF interference suppression capacitor (65 31 1 357 878). Judging by the photo, this is an analogue of part #2 for the generator.

Item No. 5 is not used.
Part No. 6 - filter for suppressing interference (65 31 9 055 974). No longer available to order. I do not know where it is installed, to what, and how it is connected. I would be grateful for this information.

Part No. 7 - tire "mass" 20X400MM (65 31 9 055 973). Maybe it's just a "repair" bus, without terminals.

A useful photo from the Internet - all the "mass" tires:

Assembly_102. ETK_65_Transitional wire.
Next subsection Adapter lead


Many different radio models were available as standard for the E30. But all these radios are divided into two types - earlier models with separate audio connectors of the old type, and later models with a new 17-pin audio connector. Accordingly, the factory audio wiring was also of two types, depending on these connectors. In order to make it possible to install any stock radio in the car, without replacing the entire audio wiring, special adapters were developed for different models of radios. There are a lot of them, with different numbers, most of them are no longer available for ordering. Therefore, I will write only about my case. I have audio wiring with a 17-pin connector, and the radios are of both types. Therefore, I need an adapter to change from a 17-pin connector to separate audio connectors.
Part No. 5 - the transition wire of the stereo system (65 12 8 350 189). I made it myself.

In principle, any of these adapters is quite easy to make yourself, having the necessary plugs and their expansion.

1 - 17-pin connector for audio wiring
2 - rear speaker connector
3 - front speaker connector
4 - radio power connector from the ignition (+12V and "ground")
5 - connector for constant power supply of the radio (+12V)
6 - connector for the backlight of the radio
7 - connector for power management of the electric antenna and amplifier
8 - connector for automatic volume control of the radio, depending on the speed of movement
For example, the pinout of my adapter:

























































































































































































































































































































































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