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SCR System Components: Notes

Fig 1: Identifying SCR Components - E70
G06896083Courtesy of BMW OF NORTH AMERICA, INC.

SCR component location - E70 

INDEX EXPLANATION CHART

Index Explanation
1 Active tank
2 Delivery module
3 Filler for active tank
4 Transfer pump
5 Filter
6 SCR catalyst
7 NOx sensor - post SCR catalyst
8 Passive tank
9 Metering module
10 Exhaust gas temp sensor - post DPF
11 NOx sensor - pre SCR catalyst
12 Filler neck for passive tank
13 DOC/DPF