The maintenance schedule as shown
is required for the proper functioning
of the emission control systems for
optimum vehicle performance and fuel
economy.
Abbreviations:
I - Inspect
R - Replace part(s) and/or fluid listed
Basic Engine
Engine oil....................................................
Engine oil filter..........................................
Fuel System
Air filter.......................................................
Ignition System
Spark plugs...............................................
Emission Control Components
Oxygen sensor..........................................
Emission Control Maintenance Schedule
3 Series and 325i, 325Ci, 325iT SULEV (PZEV)
Oxygen Sensor Service: The oxygen sensor deteriorates strictly on a mileage basis and must
therefore be replaced to maximize vehicle fuel economy and minimize exhaust pollution.
The mileage interval varies according to individual driving conditions and is determined by the
service interval indicator.
14
Oil Service
Inspection I
Oil Service
Inspection II
RRR R
RRR R
R
Replace at intervals of
100,000 miles
Replace at intervals of
120,000 miles
(SMG: 100,000 miles)3 Series
Oil Service
Inspection I
Oil Service
Inspection II
RRR R
RRR R
R
Replace at intervals of
100,000 miles
Replace at intervals of
150,000 miles 325i, 325Ci, 325iT
SULEV (PZEV)
