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ztx84 · 09-23-2020, 01:35 PM

Hi everyone,

My dad has a 218d which has just experienced a lambda/o2 sensor failure. The car is a 2017 model so just in warranty (thankfully) and has done 16,000 miles since new. The car was serviced and passed its MOT last week so this is a bit of a surprise. Any ideas about what might cause a failure of this type / might this mask a more serious problem?

I would have thought that a dodgy sensor would have affected the emissions causing an MOT failure last week, so to have this happen literally 6 days after the MOT is strange... Any input/thoughts welcome. Are there any questions I should ask the garage (who have been good I must admit)?

09-23-2020, 01:35 PM	#1
ztx84 First Lieutenant 185 Rep 301 Posts Drives: 2022 M4 Competition Xdrive Join Date: Jan 2018 Location: Devon, UK iTrader: (0)	Lambda/O2 sensor failure Hi everyone, My dad has a 218d which has just experienced a lambda/o2 sensor failure. The car is a 2017 model so just in warranty (thankfully) and has done 16,000 miles since new. The car was serviced and passed its MOT last week so this is a bit of a surprise. Any ideas about what might cause a failure of this type / might this mask a more serious problem? I would have thought that a dodgy sensor would have affected the emissions causing an MOT failure last week, so to have this happen literally 6 days after the MOT is strange... Any input/thoughts welcome. Are there any questions I should ask the garage (who have been good I must admit)?
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