Oxygen sensors clk replace or clean ?

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Kris9

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Feb 5, 2021
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Location
london
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mercedes280clk
Oxygen sensors front both banks failed star test clean or replace clk 2007 3.0v6
 
Try cleaning, if that doesn't work, replace, on the other hand, removing is not that pleasant a job, and doing it twice doesn't appeal, I'd replace if it were mine.
 
As others have stated above; you dont want to be doing this twice. When replacing make sure you get a genuine item (believe these are bosch?) and not the chinese ones as those are temperamental at best.
 
It's nearly always the heater circuit that fails.
 
I recall the LSU4.9 bosch units were alot better than the LSU4.2 variants; I suspect the CLK has the older 4.2 variant so they wont last as long. (No they are not interchangeable unfortunately)
 

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