Original BMW Crankshaft Timing Chain Sprocket for BMW 1, 3, 4, 5, 6, and 7 Series, M2, M3, M4, X1, X3, X4, X5, X6, and Z4 (2006–2021)

Mounted on the nose of the crankshaft, this Original BMW sprocket drives the timing chain on six-cylinder N51, N52, N53, N54, N55, and S55 engines in BMW models from 2006 to 2021. The crankshaft sprocket is where the timing drive starts. It turns with the crank and pulls the chain that times the camshafts. It weighs 60 g and is sold as a single piece. BMW has used this part number since April 2001. The same sprocket also appears on earlier four-cylinder N40, N42, N43, N45, and N46 engines.

This genuine BMW sprocket is backed by a 24-month parts warranty.

Some BMW timing drives use several sprockets, so the position is the first thing to confirm. This one is the crankshaft sprocket, not a camshaft sprocket or oil pump sprocket. Coverage runs from the E90-generation 325i and 330i on the N52, through the N54 335i and 135i, to the N55 F-chassis cars and the S55 M2 Competition, M3, and M4. The 1 Series M Coupe with the N54T engine uses it too. One part number covers this whole range.

Technical Details

• Manufacturer: BMW
• Part number: 11-31-7-502-180
• BMW part name: sprocket (crankshaft timing sprocket)
• Weight: 60 g (0.1 lb)
• Production start: April 2001
• Engines in our fitment: N51, N52, N52N, N53, N54, N54T, N55, and S55
• Sold as: one piece
• Warranty: 24 months

Common Questions

Is this the camshaft or the crankshaft sprocket?
It is the crankshaft timing sprocket.

Does the S55 in the M3 and M4 use the same sprocket as the N55?
Yes. BMW uses this part number on both the N55 and the S55 F80 M3, F82 M4, and M2 Competition.

Fitment & Compatibility

Confirm your model year and submodel against the table below before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.