I'm not sure why you're stuck on $700 repair. Pierburg (thru FCP Euro) is the oem supplier. $236.49 gets a new one. Took less than an hour in my driveway. No coding required. CEL will reset on its own.

Just fix it.

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Dave

'05 325xi
'10 E70 35d
'85 911 Carrera
'66 911 Work in progress
'91 Chevy C1500
'95 Jeep Cherokee
‘18 Jeep JLU