The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance. Bosch's Oxygen sensors are high quality and will give you the the longest and best performance for the price.

This is the pre-cat oxygen sensor. This is a OEM replacement part for BMW part # 11787558073 and .

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMWs:
2008-2013 E90 E92 E93 BMW M3 Sedan, Coupe, Convertible

Why own the only V8-powered M3 if you can’t actually hear it? BMW's E9X M3 features a hefty rear muffler assembly that silences the S65's distinctive soundtrack. While full cat-back systems can require a serious financial commitment, our new Muffler Delete Kit offers an affordable, no-compromise solution that brings your M3 to life!

This system transforms the character of your S65 by replacing the restrictive factory mufflers with a free-flowing, TIG-welded stainless steel assembly designed to amplify tone, shed weight, and preserve OEM fit and finish. Our design features dual 2.5" primary tubing that flows into adjustable 3" quad tips, creating a clean yet aggressive aesthetic. Up front, factory-style V-band flanges connect directly to the OEM midpipe—meaning no cutting of factory exhaust piping. At the rear, Accuseal slip-fit connections allow perfect tip alignment within the factory diffuser, ensuring a tailored, symmetrical look every time.

FEATURES

TIG-welded dual 2.5" primary tubing transitioning into adjustable 3" quad tips for a bold, refined appearance

OE-style V-band flanges for true factory-like integration—no cutting required

Accuseal slip-fit joints for full adjustability and precise tip placement

Utilizes factory hangers for a clean, bolt-on installation with zero drilling or modification

PRODUCT DEVELOPMENT

Our Rear Muffler Delete Kit is the result of advanced engineering, testing, and quality assurance by Turner’s Research & Development team. Every stage of development employs FARO laser scanning, SolidWorks 3D CAD modeling, and in-house rapid prototyping for precise fitment and design validation. Performance and durability are proven through Mustang AWD 500 SE dyno testing and Superflow SF-750 Flowbench analysis, ensuring each component meets Turner’s uncompromising standards for performance and quality.

INSTALLATION & SUPPORT

Need installation guidance? Our R&D team has you covered. A complete, start-to-finish install guide is available HERE.

Enhance Your BMW with the Magnaflow Universal Muffler

Looking for an affordable way to replace your BMW's muffler and transform its exhaust note? Your search ends here! The brand-new Magnaflow Universal Muffler is your budget-friendly solution, designed to elevate your BMW's sound and style.

Key Features:

• Budget-Friendly: The Magnaflow Universal Muffler is the go-to choice for budget-conscious BMW owners seeking an economical way to enhance their vehicle's sound.
• Enhanced Sound: This muffler delivers an improved exhaust note, creating a deeper, more attractive tone that will make your BMW stand out from the crowd.
• Universal Fit: With its universal fit, it is compatible with a range of BMW models, ensuring a seamless installation process.
• Quality Construction: Crafted from durable materials, this muffler is built to last, providing long-term performance and value.
• Turner Motorsport Approved: Endorsed by Turner Motorsport, a renowned name in the BMW community, you can trust this muffler to meet your expectations for quality and performance.

Say goodbye to that noisy ride and give your BMW the sound it deserves with the Magnaflow Universal Muffler. Upgrade today!