Knock sensors cracking

[s2driveruk]

Noticed with sorting my water manifold out that the two knock sensors which are bolted to the side of the block have cracked on the plastic outer which is bonded to the metal sleeve which the bolt passes thorugh.

While i have decent access I guess I should replace them but two things:

1) Whats the impact of them being cracked? They certainly didnt appear to affect performance or knock detection in that condition
2) can anyone confirm the part number of the longer, front sensor?

Cheers
David

[UrS4boy]

G61 and G66 Knock Sensor info

I think you are asking for electrical issues if the plastic is cracked. I would replace. Here is the info about PNs, etc. that you seek:

http://forums.quattroworld.com/s4s6/msgs/21047.phtml

[Rocco]

to be safe... change both knock sensors... surelly they are quite old and it derserves i think

i replaced both on my car...and they were in good shape but i did not want to play with rthe risk of the dangerous knocks...


they are not too expensive after all

[Thuppu]

This is one of mine knock sensors:



Does it work, I don't know..? It should be possible to test them by plugging them to your pc's soundcard, they should work like microphones.

[s2driveruk]

yep mine looks the same and works fine but I think I'll change as i can easily get to them

[orangepeel]

G61, BROWN 930mm 077-905-377 A or g61 .054905377a
G66, GREEN 740mm 054-905-377 A
org66 .054905377a i hope this helps bud

[orangepeel]

g61 is the longer one 930 mm the brown one and g66 is the green one 730 mm

[s2driveruk]

would ABY ones work in a 3b engine. they appear to interchange with several engines but the 3B ones have distinct part numbers. Presume its down to lead length more than anything else?

[orangepeel]

am not 100% sure but i think they would be the same 3b or aby i replaced mine on my 3b and theres plenty of cable mine cracked as they were originals i payed £30 a each for mine

[s2driveruk]

All of these not on general stock in the UK which is a PITA, along with G62 coolant sensor. Anyone know of any locations which might have them?

[Error404]

Luckily I have done the hard work for you mate
Order them from your local Bosch dealer, they are like 1/3 the price of the dealer

http://www.s2forum.com/forum/showthread.php?t=36766&highlight=bosch+OEM

[Bowlerwell]

Are these the same part numbers for ADU?