TRQ 2 Piece Set O2 Oxygen Sensor Compatible with 2011-2013 BMW 135i, 2011-2013 BMW 335i, 2011-2012 BMW 535i xDrive, 2011-2017 BMW X3, 2012-2013 BMW 640i

2 Piece O2 Oxygen Sensor SetKit Includes(1) Downstream O2 Oxygen Sensor(1) Upstream O2 Oxygen SensorFitmentBMW 135i 2011-13 - L6 3.0L Upstream & DownstreamBMW 135is 2013 - L6 3.0L Upstream & DownstreamBMW 335i 2011-13 - L6 3.0L Upstream & DownstreamBMW 335i GT xDrive 2014-16 - L6 3.0L Upstream & DownstreamBMW 535i xDrive 2011-12 - L6 3.0L Upstream & DownstreamBMW 640i 2012-13 - L6 3.0L Upstream & DownstreamBMW 640i Gran Coupe 2013-14 - L6 3.0L Upstream & DownstreamBMW 640i xDrive Gran Coupe 2014 - L6 3.0L Upstream & DownstreamBMW 740i 2013-14 - L6 3.0L Upstream & DownstreamBMW 740Li 2013-15 - L6 3.0L Upstream & DownstreamBMW ActiveHybrid 3 2013 - L6 3.0L Upstream & DownstreamBMW X3 2011-12 - L6 3.0L Turbo Upstream & Downstream 2013-17 - L6 3.0L Upstream & DownstreamBMW X4 2015 - L6 3.0L Upstream & DownstreamProduct AttributesQuantity: 2 PieceProduct Features Application Specific Design: No modifications and pre-calibrated Isotatic-pressed and plasma-sprayed for extended service life Double-Layered 310S Stainless Steel: Additional protection from moisture and debris Restored Engine Performance: Improved fuel economy and lower emissionsItem DetailsTRQ oxygen sensors are manufactured to precise specifications using premium raw materials to optimize your vehicle’s emission system. Each sensor is isostatically-pressed for improved strength and durability, and plasma-sprayed to improve sensitivity and prolong the service life of the sensors. Oxygen sensors wear out over time and should be replaced every 60,000 miles to prevent poor engine performance. TRQ recommends replacing the oxygen sensors in sets to optimize fuel economy and reduce overall emissions. All products are fit and road-tested in our Massachusetts R&D facility to ensure we deliver on our promise of Trusted Reliable Quality.Reference Numbers11787589475117875894761178759692416417170001700817083234-4479234-5079234-5080250-24991250-25106758947601759692401

• Kit Includes: 1 Downstream O2 Oxygen Sensor; 1 Upstream O2 Oxygen Sensor
• Reference Numbers: 11787589475; 11787589476; 11787596924; 758947601; 759692401; 16417; 17000; 17008; 17083; 234-4479; 234-5079; 234-5080; 250-24991; 250-25106
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• TRUST & COMPATIBILITY: For over 25 years, TRQ has been the premium choice for direct-fit replacement parts. Confirm fitment with the Amazon Garage "confirmed fit" feature and review our full compatibility chart below before purchase.
• EASE OF INSTALLATION: Save time and effort with pre-assembled components designed as direct replacements for the original equipment, ensuring precise fit and eliminating the need for modifications.