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NOTICE No: MT000004134
MODEL: Mazda MPV YEAR: 2002-2003
SUBJECT: Sulfur smell or odor from exhaust system
APPLICABLE MODELS: 2002-2003 MPV, 2003 Mazda6

Symptoms and Conditions

On some vehicles, a sulfur smell or 'rotten egg' odor may be noticed coming from the exhaust system. The odor is usually noticed after a cold start, fast idle, extended periods of idling and full throttle acceleration and deceleration. Sulfur smell is not an indication of an engine concern and will not cause reduced drivability or durability of the engine or any of its emission components. In most cases, the level of odor will become lower when the vehicle accumulates more mileage.

The amount of sulfur in gasoline significantly contributes to generating sulfur smell or 'rotten egg' odor. Sulfur levels in gasoline differs from brand-to-brand and also state-to-state. If a customer changes the fuel to one with lower sulfur content, the odor may disappear.

Repair Recommendation

  1. Check the vehicle for Diagnostic Trouble Codes (DTCs) and repair as necessary.
  2. If no problem is found with the engine's fuel/emission system, please ask the customer to change brands of fuel and monitor the increase or decrease in odor for at least 100 miles.
  3. If the customer complaint is not resolved by changing fuel brands, please install the following modified catalytic converters.

Parts Information

For 2002 MPV (order all four parts listed)

  • AJ51-20-55XA (converter)
  • AJ51-20-50XA (converter)
  • AJ51-20-600A (converter, catalyst)
  • AJ17-20-60XB (catalyst, 3-way)

For 2003 MPV (order all four parts listed)

  • AJ79-20-50XB (converter)
  • AJ79-20-55XB (converter)
  • AJ51-20-600A (converter, catalyst)
  • AJ17-20-60XB (catalyst, 3-way)

For 2003 Mazda6 3.0L engine only (order all four parts listed)

  • AJ57-20-50XC (converter)
  • AJ57-20-55XC (converter)
  • AJ59-20-550F (converter,catalyst)
  • AJ59-20-60XF (catalyst, 3-way)
The information and instructions in this notice are intended for use by skilled technicians. Mazda technicians utilize the proper tools/equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by "do-it-yourselfers." Consumers should not assume this notice applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies, consumers should contact their nearest authorized Mazda dealership.
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