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Bosch "Donuts" knock sensor wiring on plug'in Ecu WRX 7-9

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Hi,

I would like to use a Bosh knock sensor instead of standard one.

Best connection way should be :

1. Use OEM connection, means connect directly to OEM knock sensor wiring in engine bay ?

or

2. Go directly to the ECU and connect via "extension loom" ?

thanks in advance for your comments.

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Also, what would be the correct model for the Bosch sensor?

Will this one be the correct for a Subaru (EJ20)?
Bosch 65018

bosh.PNG

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On 3/20/2019 at 5:15 PM, Adamw said:

Connect to the factory knock sensor wiring.  Bosch 0 261 231 006 is a common wideband part number.

In my case (WRX 5-6) my factory knock has only one wire and the new bosh knock sensor has 2.

Should I rewire the bosh knock sensor to the extension loom to have the signal + ground or can I just use the factory connector plugging it to any pin or the new knock sensor?

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I think you mainly use Factory wiring with the single knock wire to the Bosch which other side should be wired to any sensor ground.

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