4pcs Upstream Downstream For BMW 325i 325Ci 2.5L 03-06 Air Fuel Ratio O2 Sensor Exhaust Silencers Most components are made from

Most components are made from 6061-T6 Billet Aluminum to increase hardness

compatible for ALFA ROMEO 147 1

0L 1998CC 122CID L4 DOHC TURBOCHARGED

G20 2019+ 330i

Can safely run with zero air pressure

4pcs Upstream Downstream For BMW 325i 325Ci 2.5L 03-06 Air Fuel Ratio O2 Sensor Exhaust Silencers Most components are made fromFitments: 2003 2006 BMW 325Ci,2003 2005 BMW 325i,etc. High grade platinum and ceramics,This resulted in a sensor that started sooner and responded faster. This Sensor features double protection layer, aluminum oxide trap layer, porous PTFE filter. It is manufactured with precision to meet OE standards.