Keep your BMW's air-fuel ratio precisely metered with the Bosch Oxygen Sensor 17099. This upstream (pre-catalytic-converter) sensor reads the oxygen content in the exhaust stream and sends a signal to the engine control unit, which uses it to trim fuel delivery for cleaner, more efficient combustion. It's a direct-fit replacement for the listed 2006-2013 BMW applications, cataloged for the upstream — and on applicable engines, the upstream rear — position.
Signs this sensor may need replacing include a check engine light, reduced fuel economy, or rough running. These symptoms can have other causes, so diagnose the fault before replacing; if a failed upstream oxygen sensor is confirmed as the cause, this replaces it.
Fitment: 2006 BMW 325I, 325XI, 330I, 330XI; 2006-2007 BMW 525I, 525XI, 530I, 530XI; 2006-2011 BMW 323I, Z4; 2007-2008 BMW 328XI; 2007-2010 BMW X3; 2007-2013 BMW 328I; 2008 BMW 528XI; 2008-2010 BMW 528I; 2008-2013 BMW 128I; 2009-2010 BMW 528I XDRIVE; 2009-2013 BMW 328I XDRIVE. See the Buyer's Guide tab for the full application list.
Manufacturer part number 17099.
What does the Bosch 17099 oxygen sensor do?
It measures the oxygen content in the exhaust and sends a feedback signal to the ECU, which uses it to adjust the engine's air-fuel ratio. As an upstream sensor, it sits ahead of the catalytic converter.
Where is this oxygen sensor located?
It's an upstream oxygen sensor, mounted before the catalytic converter. On applicable engines it fills the upstream rear position.
Which vehicles does this sensor fit?
It's a direct-fit replacement for many 2006-2013 BMW models, including the 128I, 323I, 328I, 525I, 530I, X3 and Z4. See the Buyer's Guide tab for the full application list.
What are signs my oxygen sensor may need replacing?
Common signs include a check engine light, reduced fuel economy, or rough running. These can have other causes, so diagnose the fault before replacing; if a failed upstream sensor is the cause, this replaces it.
What is the manufacturer part number?
This is Bosch Oxygen Sensor, manufacturer part number 17099, for the listed BMW applications.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
