Over a year ago, local MB dealer replaced bank 2 oxygen sensor 2 after CEL and codes 156, 161. The car is '99 ML320. The installed part # is 001 540 28 17, which is O2 sensor fitting 2000-2003 ML55AMG (supercharged V8?????). I should have got #001 540 60 17 (or 001 540 37 17 R/F). I have what appears to be a heater failure on that installed sensor. Same bank, same sensor, code 161 again. Would that ML55 sensor cause this premature O2 heater circuit failure?
Please help me solve this mystery.

I have the same codes and am balking at the $98 price tag for a new sensor. They seem to be different part number for the rear sensor as apposed to the front, but this morning, I saw a Borg-Warner part that says it is a drop in replacement for both the front and the rear. (No connector)

Does anybody have any experience with this?

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

the first number seems correct, it will fit, both say after cat
ML 320 98-03
ML 430 99-01
ML 55 00-03

the ML55 is not supercharged

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1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins

So is it common for this Bosch O2 sensor to fail after 15 months or 10K miles of service? The factory manual CD indicates a problem in resistance causes code 161, I just dont know if it is that barely new O2 sensor or wiring. Checked wiring and found nothing suspicious.