BMW Maintenance & Tune-Up Parts for BMW 5 Series E34 (1987-1995)

This OEM Ruville hydraulic tensioner assembly is designed to keep the serpentine belt at the correct pressure against the pulleys. Many BMW's can have either a hydraulic or mechanical belt tensioner. Please check to see which tensioner type you need before ordering.

OEM Schaeffler (INA, LuK, Ruville, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

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:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i

CATACLEAN - The Original Science is a patented, EPA-approved engine, fuel, and exhaust system cleaner that effectively reduces carbon build-up and cleans critical components such as oxygen sensors, fuel injectors, and cylinder heads. This versatile product is safe for gasoline, diesel, and hybrid engines and does not alter fuel composition.

• EPA Approved: Meets stringent environmental standards for safe and effective use.
• Versatile Compatibility: Safe for gasoline, diesel, and hybrid engines without altering fuel composition.
• Comprehensive Cleaning: Cleans oxygen sensors, fuel injectors, and cylinder heads while reducing carbon build-up.
• Emission Reduction: Can lower total hydrocarbon emissions by up to 50%, improving environmental performance.
• Enhanced Engine Performance: Addresses drivability issues like power reduction, hesitation, and hard starts.
• Catalytic Converter Efficiency: Helps restore and maintain catalytic converter efficiency, extending vehicle life.
• Improved Fuel Efficiency: Can lead to better fuel efficiency and increased MPG.
• Easy to Use: Simply pour into the fuel tank and drive for optimal results; use four times a year.
• Durable Packaging: New COEX-HDPE bottle designed for increased strength with no evaporation.

Experience the power of Cataclean, an EPA-approved solution designed to comprehensively clean your BMW's engine, fuel system, and exhaust. This patented formula targets carbon build-up while revitalizing oxygen sensors, fuel injectors, and cylinder heads. Compatible with gasoline, diesel, and hybrid engines, Cataclean ensures peak engine performance without altering fuel composition. Independent emissions testing has shown significant reductions in hydrocarbon emissions, making it a trusted choice for engine maintenance. Utilize Cataclean regularly to address drivability issues, enhance catalytic converter efficiency, and extend your vehicle's lifespan. With its easy-to-use design, simply pour and go every three months to keep your BMW running smoothly.

• EPA Approved formula
• Easy-to-use application every 3 months
• Compatible with capless gas tanks
• Safe for gasoline, diesel, and Hybrid engines
• Reduces hydrocarbon emissions by up to 50%
• Restores catalytic converter, oxygen sensors, fuel injectors, and cylinder heads
• Legal in all 50 states
• Patented formula
• Improves fuel efficiency and MPG
• Features COEX-HDPE bottle for increased strength and no evaporation