Knock Sensors
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,517
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Knock Sensors
I will be doing an intake manifold replacement and some have suggested replacing the Knock sensors while I am in there.
Maybe the Quality Engineer in me is coming out, but:
If these parts rarely fail, I think it is safer to leave in a set of 10 year/140K miles "pretested" sensors, rather than risk an "Early Life Failure" of an untested new part.
On the other hand, if these are parts many people have found to fail sometime prior to 200K miles and 15 years, it is probably worth changing them out as if they are "wear parts".
Thoughts?
Maybe the Quality Engineer in me is coming out, but:
If these parts rarely fail, I think it is safer to leave in a set of 10 year/140K miles "pretested" sensors, rather than risk an "Early Life Failure" of an untested new part.
On the other hand, if these are parts many people have found to fail sometime prior to 200K miles and 15 years, it is probably worth changing them out as if they are "wear parts".
Thoughts?
Junior Member
Joined: May 2009
Posts: 44
Likes: 2
From: Near Sublimity, OR
S430 99K, , E320 Wagon 130K, E420 249K(Sold), 240D (Sold)
I'm just a very recent W211 owner, but if its any comfort, the knock sensors in the M119 V8 of my W124 are original, have gone 249,000 miles/23 years without issue and it is an 11/1 compression engine. Still, were I you, would probably replace them. Don
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,517
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
In general, unless a part has a history of failure, I trust "time tested" over risking an "early life failure".
