LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 2012 >> 335is 2D Convertible, Standard Trans >> Repair and Diagnosis (Single Page) >> General Information >> OEM General Information >> Functional Description - E93 - Cooling Systems And Engine Performance >> Engine Performance - Functional Description >> Selective Catalytic Reduction (SCR) System (US Diesel) (Without Passive Tank) >> Components of the SCR system (without passive tank)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Components of the SCR system (without passive tank)

Index Explanation
1 Digital diesel electronics
2 Line heating
3 Fine filter
4 SCR delivery module heating
5 Mechanical changeover valve for active tank (4/2-way valve)
6 Pressure sensor for active tank
7 Pump/SCR delivery module
8 Filter before throttle for return flow
9 Throttle for return flow of the delivery volume of the pressure regulation
10 Line heating of the intake pipe in the active tank
11 Heating of the urea/water mixture
12 Nitrogen oxide sensor after SCR catalytic converter
13 SCR catalytic converter
14 Mixer device
15 SCR metering module
16 Temperature sensor for active tank
17 1 x 4-pin tank fuel level sensor, including evaluation at the active tank
18 Temperature sensor before SCR catalytic converter
19 Nitrogen oxide sensor before SCR catalytic converter
20 Fuel differential-pressure sensor of the diesel particulate filter
21 Diesel particulate filter
22 Oxidation catalytic converter
23 Temperature sensor before diesel particulate filter
24 Oxygen sensor (upstream of catalytic oxidation catalytic converter)
25 Temperature sensor before oxidation catalytic converter
26 Power switch for line heating for SCR delivery module
27 Power switch for tank heating