Cloyes Engine Timing Crankshaft Sprocket P/N:S921
Cloyes S1129 inner timing crankshaft sprocket for the 2014-2016 Mazda CX-5 4-cylinder 2.5L and other vehicles drives the timing chain from the crankshaft. This engine timing crankshaft sprocket works with the chain, tensioners, guides and other sprockets to hold the timing precise.
Worn teeth can show up as a rattle from the timing area or rough running. Those signs alone do not prove the sprocket is the problem, since a stretched timing chain can cause them too.
The 2014-2016 Mazda CX-5 4-cylinder 2.5L, the 2016 Mazda CX-9 4-cylinder 2.5L and the 2014-2016 Mazda 3 4-cylinder 2.5L all take this sprocket, and so do other Mazda models. It is built for OE-level fit and function. If your car is not named here, look up its year and engine on the Buyer's Guide tab.
Fit and size
Build and materials
One inner timing crankshaft sprocket. A 2.5L engine takes one.
Is the Cloyes S1129 sprocket right for the 2016 Mazda CX-9 4-cylinder 2.5L?
Yes, Cloyes S1129 is listed for the 2016 Mazda CX-9 4-cylinder 2.5L; for other Mazda years and engines, look up your car on the Buyer's Guide tab.
What is the bore size on the Cloyes S1129 timing sprocket?
The mounting hole diameter is 30.048 mm (1.183 in), and the Cloyes S1129 is 14.072 mm (0.554 in) wide.
Does this inner crankshaft sprocket run a roller chain?
Yes. It is made for a roller-type chain with a single chain row, and its tooth width is 4.14 mm (0.163 in).
What can a worn crankshaft sprocket sound or feel like?
Worn or hooked teeth can show as a rattle from the timing area, rough running or a timing-related warning light.
Should the timing chain be replaced along with this Cloyes sprocket?
Yes. Replacing the chain, tensioners, guides and sprockets together during service helps keep the whole timing system sound.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.