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Bosch 15321 Oxygen Sensor Heated Universal Sensor - 4-Wire O2

(2004-2005 BMW 545i Base; 2004-2005 BMW 645Ci Base; 2004-2005 BMW 745i Base; 2004-2005 BMW 745Li Base; 2007-2008 BMW Alpina B7 Base)

Part of: Bosch Oxygen Sensor Heated Universal Sensor

Other options in this family: Bosch 13806 Bosch 13775 Bosch 15122 Bosch 15376 Bosch 15508

Manufacturer

Picture for manufacturer Bosch

Part Number

15321
13 reviews
Sale Price

$97.48

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Bosch 15321 Oxygen Sensor delivers precise air-fuel ratio monitoring for optimal engine performance and emissions control. This universal heated oxygen sensor features premium ceramic technology and advanced filtration to ensure accurate readings and extended service life.

Key Features:

  • 4-wire heated oxygen sensor with 16.5-inch wire length for universal installation
  • Premium ceramic construction incorporating Zirconium or Titania and Yttrium elements for superior protection against mechanical and thermal shock
  • Patented catalytically activated fine particle filter prevents contamination and ensures precise voltage signals to the engine control computer
  • Dual-filter design provides double protection against exhaust gas contamination, extending sensor lifespan
  • OE-style silicone boots ensure proper fit, function, and professional appearance
  • Direct plug-in installation with no cutting or splicing required
  • Helps prevent premature catalytic converter failure by maintaining accurate emissions data
  • Rigorously tested for optimal performance and fuel efficiency

This sensor is designed for installation on the driver side, after the catalytic converter. Bosch oxygen sensors are engineered to meet or exceed OE specifications, providing reliable performance and accurate emissions monitoring. Sold individually.

Products specifications

Fits

2004-2005 BMW 545i Base; 2004-2005 BMW 645Ci Base; 2004-2005 BMW 745i Base; 2004-2005 BMW 745Li Base; 2007-2008 BMW Alpina B7 Base

Cost of lakemaster almost too good to be true. Easy to navigate website.

Great site!

The price was high could have been lower and shipping was high for a little round thing

great job parts we in great shape and shocked with the fast delivery keep up the great work will be ordering again soon

Best Price!!!

We’ll see how it goes . So far so good .

Autoplicity had the lowest price by far and shipping was very fast (ordered Wednesday evening, arrived Saturday morning). I will definitely order from Autoplicity again!

Very pleasant order over the phone. Gentleman was smart, cheerful and helpful.

very good

Just what you want from a merchant but don't expect; fast, courteous service and attention to the details of your order. I'm a happy consumer. Thank you, Autoplicity. I'll be back.

Autoplicity cares about there customers. I ordered a flash programmer and got to the last page and never got a confirmation of the order. I used the website chat and talked to somebody about it right away. So I ordered again and got a conformation. But both went though. Autoplicity called me next day a.m. to see if I made a mistake. Thanks for letting me know and correcting to one order. Saved me from shipping back a product I dind't need.

Good products with low prices. Easy website and pament options.

Exact product as promised with the best price on the internet. Product shipped fast and had a tracking number to keep me up to date on my order. I would order from again without hesitation and will tell friends.

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