Vemo V20-72-9901 Engine Crankshaft Position Sensor Seal

Engine Crankshaft Position Sensor Seal for BMW

VEMO V20-72-9901 is an OE-style engine crankshaft position sensor seal built for precise sealing at the sensor interface. With a 17 mm inner diameter and 3 mm thickness, it is sized for a secure fit on supported BMW applications and helps maintain a clean, stable seal around the crankshaft position sensor area.

Compatible With BMW i3, Z4, 128i, 328i, 328i xDrive, 335is, 740i, 740Li, X3, 1 Series M, 528i, 135i, 335i, 335i xDrive, 528i xDrive, 535i, 535i xDrive, X5, and X6 applications listed below. The VEMO brand line focuses on OE-grade replacement parts, and this seal follows that approach with elastomer construction and application-specific sizing.

Key Features

• Part number V20-72-9901 for BMW crankshaft position sensor sealing applications
• O-ring shape with 17 mm inner diameter and 17 mm seal diameter
• 3 mm thickness and 3 mm height for a compact sealing profile
• Made from FPM (fluoride rubber) and ACM (polyacrylate rubber)
• Elastomer specification for engine bay sealing use
• OE-grade replacement focus from VEMO

Detailed Description

VEMO V20-72-9901 is an engine crankshaft position sensor seal designed around the dimensions commonly required for BMW sensor service work. The O-ring profile, 17 mm inner diameter, and 3 mm thickness support a precise seal at the sensor mounting point, while the FPM/ACM material blend is selected for automotive sealing environments where heat and fluid exposure are factors. This part cross-references 1 748 398 and 12 14 1 748 398 for the same application.

Use V20-72-9901 when servicing BMW models such as the 2009-2013 BMW 328i, 2009-2010 BMW 335i, or 2014-2017 BMW i3 where the crankshaft position sensor seal is specified. It is also listed for BMW Z4, X3, X5, X6, 528i, 535i, 740i, 740Li, 135i, 128i, 335is, 1 Series M, and related xDrive applications.

Vehicle Fitment

• Fits 2014-2017 BMW i3, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2016 BMW Z4, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2013 BMW 128i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2013 BMW 328i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2013 BMW 328i xDrive, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2011-2013 BMW 335is, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2011-2012 BMW 740i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2011-2012 BMW 740Li, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2012 BMW X3, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2011 BMW 1 Series M, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2011 BMW 528i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 135i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 335i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 335i xDrive, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 528i xDrive, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 535i, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW 535i xDrive, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW X5, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO
• Fits 2009-2010 BMW X6, N/A; Grade: OE; Plug (Connector): 3 Pins; VEMO

Common Service Uses

• Replacing a worn or flattened crankshaft position sensor seal
• Addressing oil seepage around the sensor mounting area
• Restoring a proper seal after crankshaft sensor service
• Correcting fitment issues caused by an incorrect seal size
• Supporting clean sensor installation on BMW engine applications

Installation Notes and Tips

Confirm the sensor seal dimensions before installation: 17 mm inner diameter, 17 mm seal diameter, and 3 mm thickness. Inspect the sensor bore and sealing surface for debris, hardened residue, or damage before fitting the new O-ring. For BMW applications such as the 328i, X3, and 528i, verify the connector and OE reference against the vehicle’s original part before reassembly.

Quality Assurance

VEMO OE-grade replacement parts are built to match application-specific requirements for European vehicle service. The V20-72-9901 uses FPM and ACM elastomer materials selected for automotive sealing performance in crankshaft position sensor applications.