Mazda CX-9 Grand Touring 2007 Manual page 232

Fig. 57: Identifying Marks On Camshaft Timing Chain (RH)
Courtesy of MAZDA MOTORS CORP.
4. Remove the timing chain in the following order.
1. Chain tensioner
2. Timing chain
3. Tensioner arm
4. Chain guide
5. Crankshaft sprocket
2007 Mazda CX-9 Grand Touring
2007 ENGINE Mechanical (MZI-3.5) - CX-9