13323AA051 Subaru SPKT AY-CMS,EXH LH, Price: 140.79$, Weight: 1.454kg

Left Exhaust Camshaft Sprocket Assembly ⚙️

This part is a key timing component on the left cylinder head, linking the engine’s camshaft to the timing drive so valves open and close at the correct moment. It’s needed to keep combustion smooth, power strong, and emissions controlled. When this sprocket is healthy, it holds precise tooth engagement and stable alignment, helping the camshaft rotate in perfect sync with the crankshaft ?.

How It Works

The sprocket’s teeth mesh with the timing chain/belt system, transferring rotation to the exhaust camshaft. Accurate indexing keeps valve timing correct across the RPM range, supporting clean exhaust flow and steady idle. Proper fit also reduces timing noise and prevents chain/belt tracking issues.

Why Replacement Matters

Common Problems When Worn or Broken ?

• Rattling/metallic timing noise at start-up
• Misfire, rough idle, weak acceleration
• Check Engine light and timing correlation faults
• Hard starting or stalling
• Risk of severe valve timing slip and engine damage

If the sprocket teeth wear or the hub loosens, timing can drift. In worst cases it can jump timing, causing valve-to-piston contact on many engines—an expensive repair. Replace at the first sign of timing noise or timing-related fault codes ✅.

Compatibility

• Outlander<Phev>