U.S. Toll-Free Call Center   Hours
Espanol: 866-401-3393

Highest Ratings

Quality: We've got the awards to prove it!

We've won the Bizrate Circle of Excellence award,
7 years in a row. Rated outstanding for quality, satisfaction, service, and on time delivery. 1A Auto selects the highest quality parts from the best manufacturers. Check our excellent ratings.
Fastest Shipping
No-Hassle Returns
USA Support Techs
Best Value
Our Guarantee

Customer Feedback

 Lenses are GREAT with th...
'98 Jeep Grand Cherokee (5.2L) LTD. (with a few mods)
Jim S.

Click here to try out our new site!
Home > BMW > 545i > Oxygen Sensors > 2004-2005 BMW 545i Upstream O2 Oxygen Sensor for V8 4.4L Passenger Side (Walker Products)

  Send to a friend    
  Product views

2004 - 2005 BMW 545i Upstream O2 Oxygen Sensor for V8 4.4L Passenger Side (Walker Products)


In Stock (Ships same day for orders placed by 3 PM ET)

List Price:$305.51
Our Price: $135.45
 (You Save $170.06)

Free Ground Shipping
Part Number: WKEOS00091

Welcome Message from 1A Auto

Walker Products Oxygen Sensor: 250-25004

Walker Products, an ISO 9001-2008 / TS16949 certified company, specializes in the manufacturing and distribution of Fuel System Components and Automotive Engine Management products. Walker is committed to meeting or exceeding OEM or equivalent standards and specifications. This effort is backed by Walker's own manufacturing, product management and engineering expertise.


  • Brand New Walker Oxygen Sensor
  • Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (57.0 Inches)
  • Upstream Sensor
    • as listed per application
  • 5 wire configuration
  • Replaces dealer part numbers: 11787515826, 11 78 7 515 826, 11787515827, 11 78 7 515 827, 11787516150, 11 78 7 516 150, 11787529980, 11 78 7 529 980, 11787530736, 11 78 7 530 736, 0025401817, 002 540 18 17, 0035427318, 003 542 73 18, 94860612802, 948 606 128 02, 022906265A, 022 906 265 A, 06A906262BC, 06A 906 262 BC, 06A906262BH, 06A 906 262 BH, 06A906262BQ, 06A 906 262 BQ, 06B906265D, 06B 906 265 D, 077906265AC, 077 906 265 AC, 07D906262C, 07D 906 262 C
  • Built and tested to strict quality control standards

Note: For clarification purposes:

  • Upstream location is between the catalytic converter and the engine
  • Downstream location is between the catalytic converter and the tailpipe

If you have a bad O2 sensor causing your vehicle to run poorly or fail an emission test then this is the part for you.

Note:  You may be required to reset the vehicle’s computer after installation of this part.

1 Year Warranty

This item is backed by a 1 Year Manufacturers Warranty. In the event this item should fail during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

Part Brand: Walker Products # 250-25004

See 1A Auto on Facebook Watch our auto parts installation videos on Youtube Nutts and Bolts Blog Google Plus
Free Shipping