2X Upstream Oxygen Sensors for BMW E38 E39 E46 323i 325i 328i Z3 Z4 (1997–2006)

Includes:
- 2X Upstream Oxygen Sensors

Fits Models:
- BMW 323i, 325i, 328i, Z3, Z4

Model Years:
- 1997–2006

Submodels:
- E38 (7 Series), E39 (5 Series), E46 (3 Series), Z3, Z4
- Common trims include Base, Sport, and various performance packages.

Engine Options:
- Common engine sizes include 2.5L I6 (M52), 2.8L I6 (M52), 3.0L I6 (M54)
- Engine codes: M52B25, M52B28, M54B30

Description:
These upstream oxygen sensors are designed for select BMW models from 1997 to 2006, ensuring optimal engine performance and emissions control. They monitor the air-fuel mixture and help maintain fuel efficiency.

Features:
- Direct fit for specified BMW models
- High-quality construction for durability
- Improves fuel efficiency and reduces emissions
- Easy installation with no modifications required
- Compatible with both standard and performance engine options