The plastic epoxy that the knock sensor is cast in on my 2.2l legacy motor is craking. No codes indicating a malfunction have been set, so I'm wondering whether to replace it or not?

replace it before you get codes. Always easier to replace things on your terms then the cars.

 

 

nipper

What colour is the connector? They revised the design of the sensor and changed the connector to white - old style is gray.

 

Replace it if the connector is gray - nevermind whether it's cracked or not.

Ditto on the old style replacement.

 

But yeah, if it's cracked, you should replace it.

Thanks. I will look for a new one.

What year did they change? I'm reading into the remarks that the grey version is inferior.

It was like the early-mid 90's when things changed