2004 BMW 3 SERIES catalytic converter

If your car is driven only for short distances of
less than 10 miles over a prolonged period of
time, without an occasional drive at highway
speeds, the engine’s charging system will not
maintain the battery. Insufficient use of the
vehicle could result in short term starting
problems and in the long term could damage
the battery.
In case the car is not operated for more than
four weeks it is advisable to:
a) consider using a proper trickle charger,
following the charger manufacturer’s
instructions, to maintain the battery’s state of
charge; or
b) consult your BMW center regarding battery
removal. Once removed, the battery must be
charged and stored in a cool, dry place
where it can be protected from freezing. If
the battery will be stored for over 3 months, it
must be recharged every 3 months, or else it
will become damaged and useless.
Please consult with your BMW center for
further guidance and information.
Corrosion Protection
Extensive corrosion protection measures
implemented by BMW now make it possible to
offer a six-year limited anti-corrosion warranty
against rust perforation on your vehicle
provided that the vehicle is maintained in
accordance with the provisions of the New
Vehicle Limited Warranty as outlined in the
Warranty Section of this Statement (page 29).
The major degree of corrosion protection is
due to the electrophoretic dip painting process
which cathodically deposits paint particles on
all body parts, attracting paint particles into the
minutest cavities or seams. Body parts are
designed to provide optimum corrosion
protection.During manufacture, exterior body parts
receive an additional corrosion protection coat.
Hood, trunk, doors and other body parts with
metal folds are coated with PVC and sealed
from the outside.
All floor panels receive a resilient coating of
PVC for maximum protection against damage
due to stones, etc.
Corrosion protection materials tested over
many years are applied to the surfaces of
cavities and to the entire underside of the
vehicle during and after assembly.
Requirements for maintaining the six-year
limited anti-corrosion warranty are outlined in
the Warranty Section of this Statement (page
31).
Restoring corrosion protection
Please take care that anti-corrosion material is
replaced when your car is repaired after body
or chassis damage.
BMW will not accept any liability for any
parts and accessories not approved by
BMW.
Underbody maintenance
The underbody has to be cleaned at least
once a year, in spring, with plain water in order
to remove mud, chemical sediments and other
deposits. If those materials are not removed,
corrosion (rust) will occur.
Your BMW center will do this anti-corrosion
service for you.
WARNING
Do not apply additional undercoating or rust-
proofing on or near the exhaust manifold,
exhaust pipes, catalytic converter or heat
shields. During driving, the substance used
for undercoating could overheat and cause
a fire.
Battery Care
14

33 You may obtain fur ther information concerning
the emission warranties, or report violations of
warranty terms, by contacting the Manager,
Certification and Compliance Division (6405J),
Warranty Claims, Environmental Protection
Agency, Ariel Rios Building, 1200 Pennsylva-
nia Avenue, N.W., Washington, D.C. 20460.
The following systems are covered by the
Federal Emission Performance Warranty for a
period of two years or 24,000 miles, whichever
occurs first. The specific systems may vary
according to model, therefore, all of the
systems listed may not be used on your
vehicle. For assistance in determining which
systems and specific components within these
systems apply to your vehicle, please contact
your BMW center.
AIR INDUCTION SYSTEM
FUEL METERING SYSTEM
IGNITION SYSTEM
POSITIVE CRANKCASE VENTILATION
SYSTEM (PCV)
FUEL EVAPORATIVE CONTROL SYSTEM
EXHAUST SYSTEM
ENGINE EMISSION CONTROL SYSTEM
SENSORS/DEVICES
ON BOARD DIAGNOSTIC SYSTEM (OBD)
RELATED PARTS ASSOCIATED WITH THE
ABOVE SYSTEMS
The following components and/or system are/
is covered under the Federal Emission
Performance Warranty for a period of 8 years
or 80,000 miles, whichever occurs first.
CATALYTIC CONVERTER
ENGINE CONTROL MODULE (INCLUDING
ON-BOARD DIAGNOSTIC SYSTEM)For assistance in determining coverage of the
specific components of the on-board
diagnostic system, please contact your BMW
center.

The California Air Resources Board and BMW
of North America (BMW NA) are pleased to
explain the emission control system warranty
on your 2004 vehicle. In California, new motor
vehicles must be designed, built and
equipped to meet the State’s stringent anti-
smog stan-dards. BMW NA must warrant the
emission control system on your vehicle for the
periods of time listed below provided there has
been no abuse, neglect or improper
maintenance of your vehicle.
Your emission control system may include
parts such as the fuel injection system, the
ignition system, catalytic converter, and engine
computer. Also included may be hoses, belts,
connectors and other emission-related
assemblies.
Where a warrantable condition exists, BMW NA
will repair your vehicle at no cost to you
including diagnosis, parts and labor.
Manufacturer’s Warranty Coverage:
– For 3 years or 50,000 miles whichever
occurs first:
1. If your vehicle fails a Smog Check inspec-
tion, all necessary repairs and adjustments
will be made by BMW NA to ensure that
your vehicle passes the inspection. This is
your emission control system PERFOR-
MANCE WARRANTY.
2. If any emission-related part on your vehicle
is defective, the part will be repaired or
replaced by BMW NA. This is your short-
term emission control system DEFECTS
WARRANTY.
– For 7 years or 70,000 miles whichever
occurs first:
If an emission-related part, specially noted on
page 40 as having coverage for 7 years or
70,000 miles is defective, the part will berepaired or replaced by BMW NA. This is your
long-term emission control system DEFECTS
WARRANTY.
Owner’s Warranty Responsibilities:
– As the vehicle owner, you are responsible
for the performance of the required mainte-
nance listed in your Owner’s Manual. BMW
NA recommends that you retain all receipts
covering maintenance on your vehicle, but
BMW NA cannot deny warranty solely for
the lack of receipts or for your failure to
ensure the performance of all scheduled
maintenance.
– You are responsible for presenting your
vehicle to an authorized BMW center as
soon as a problem exists. The warranty
repairs should be completed in a reason-
able amount of time, not to exceed 30 days.
– As the vehicle owner, you should also be
aware that BMW NA may deny your
warranty coverage if your vehicle or part has
failed due to abuse, neglect, improper
maintenance or unapproved modifications.
If you have any questions regarding your
warranty rights and responsibilities, you should
contact:
BMW of North America
Customer Relations Department
PO. Box 1227
Westwood, N.J. 07675-1227
Telephone: 1-800-831-1117
Website: www.bmwusa.com
or the
California Air Resources Board
9528 Telstar Avenue
P.O. Box 8001
El Monte, CA 91731
*The California Emissions Control System
Limited Warranty applies to all 2004 U.S.
specification BMW vehicles sold, leased, and/or
registered in California, Maine, Massachusetts
or Vermont.
California Emission Control
Warranty Statement*
Your Warranty Rights and
Obligations
34

37 For assistance in determining which parts are
covered by this warranty, please contact your
authorized BMW center or the BMW NA
Customer Relations Department at
1-800-831-1117 or through our website at
www.bmwusa.com. You may obtain further
information concerning the emissions warranty
or report violations of warranty terms, by
contacting Air Resources Board (ARB), Mobile
Source Division, 9528 Telstar Avenue, P.O. Box
8001, El Monte, CA 91731. Please include the
title of the BMW service department head and
telephone number.
California Emission Warranty
Parts List
The following components are covered for
defects by the California Emission Control
System Limited Warranty for a period of 7
years or 70,000 miles, whichever comes
first.
COMPONENT 3 Series
INTAKE MANIFOLD 
VANOS CAMSHAFT POSITION CONTROLLER 
ENGINE CONTROL MODULE 
FUEL TANK 
EXHAUST MANIFOLD 
EXHAUST MANIFOLD WITH CATALYST 
THREE WAY CATALYTIC CONVERTER 
TRANSMISSION CONTROL MODULE 
SMG CONTROL MODULE 
TRANSMISSION CONTROL MODULE