Moog 678 Drive Shaft Coupler

Moog 678 Drive Shaft Coupler

Restore driveline smoothness with the Moog 678 drive shaft coupler. This premium replacement is built to reduce noise, vibration, and harshness caused by worn OE couplers, helping bring back more consistent power transfer in BMW driveline applications.

• Premium-grade drive shaft coupler for driveline repair
• Helps reduce noise, vibration, and harshness from deteriorated couplers
• Direct replacement for worn OE-style driveline coupler applications
• Fits rear driveshaft, transmission, rear axle, and transfer case locations depending on vehicle
• Cross-references URO 26117610061 for the same application

Detailed Product Overview

Moog 678 is a premium drive shaft coupler engineered for BMW driveline service where the original coupler has worn, cracked, or deteriorated. It is used in rear driveline locations including the rear driveshaft at the transmission, rear axle, transfer case, and rear positions across a wide range of BMW models. Compatible applications include BMW Z4, 330i, 540i, X5, X6, and X7, along with additional 3 Series, 5 Series, 6 Series, 7 Series, M Performance, and xDrive models listed in the fitment data. The Moog 678 part number is a direct reference for buyers searching for a replacement driveline coupler that addresses vibration and ride-quality concerns.

Built as a premium replacement, this coupler is intended to restore driveline feel by replacing a worn connection point between drivetrain components. For shoppers comparing BMW Z4 rear driveshaft at transmission fitment or BMW X5 rear driveshaft at transfer case fitment, Moog 678 provides a focused solution for the specified 105 mm bolt diameter applications.

Common Problems This Part Addresses

• Driveline vibration felt during acceleration or cruising
• Clunking or thumping from a worn rear driveshaft coupler
• Excess noise and harshness from deteriorated OE rubber or coupling material
• Loose or inconsistent driveline engagement at the transmission, rear axle, or transfer case
• BMW driveline service needs on vehicles with 105 mm bolt diameter coupler applications

Installation Notes and Tips

Verify the driveline position before ordering, since fitment varies by location: rear driveshaft at transmission, rear driveshaft at rear axle, rear driveshaft at transfer case, or rear. Confirm the vehicle’s 105 mm bolt diameter requirement and match the application exactly to the listed BMW model and year. Inspect adjacent driveline components for wear before installation so the new coupler is not installed alongside damaged mounts or shafts.

Quality Assurance

Moog premium driveline couplers are made to replace worn OE couplers and help restore ride quality while reducing noise, vibration, and harshness. Part number 678 is a premium-grade driveline replacement for the specified BMW applications.