4 NHTSA owner complaints for the 2004 Nissan Sentra mention the catalytic converter. 2 additional reports concern a related system category and are counted separately. Usable reported mileage (n=4) has a median of 79,565 mi. 17 replacement listings match this model year in our catalog.
Owner complaints whose text directly mentions this component.
Same vehicle, mapped category, part not named.
Replacement listings that match this model year.
These figures describe mileage reported in owner complaints submitted to NHTSA. They do not represent the failure rate of all vehicles.
An overheating or damaged catalytic converter can be an exhaust-heat and emissions issue. This is not a determination that the vehicle is unsafe to drive, and it is not a recall finding.
This describes how this component can affect control, stopping, cooling, or fuel containment. It is not a recall, not a statement that this vehicle is unsafe to keep driving, and not a generic list of unrelated automotive hazards.
4 NHTSA owner complaints for this model year mention the catalytic converter.
2 additional reports are coded to a related system category but do not name this part. Those counts are kept separate and are not treated as catalytic converter failures.
Among 4 direct-mention reports with usable odometer data, the median reported mileage is 79,565 mi.
25th percentile 71,638 mi; 75th percentile 122,767 mi. These figures describe mileage reported in owner complaints submitted to NHTSA. They do not represent the failure rate of all vehicles.
17 replacement listings match this model year in our catalog.
That match is an exact model-year row in the retailer fitment feed — not a guess from a similar vehicle. Confirm engine, drivetrain, and production date on the listing before buying.
When a catalog match exists, replacement listings for this model year are linked through parts.autotk.com. This page does not invent compatibility.
The replacement link only appears when the catalog feed has at least one compatible product for this exact model year.
Mechanically related parts include oxygen sensor. Similar symptoms can come from those parts or from the broader system, not only from a failed catalytic converter.
Use the related-component links on this page when those combinations are published. A system-category NHTSA report is not proof that this specific part failed.
A failing catalytic converter can be one of several causes of a P0420-style catalyst efficiency code. That possibility is not a diagnosis of this vehicle.
Also consider oxygen sensor and other system faults. Verify with testing rather than replacing parts from a list.
If the symptom remains after a catalytic converter replacement, another cause — including oxygen sensor — may still be involved, or the replacement may not have addressed the actual fault.
This is a diagnostic branch, not proof that the new part is defective or that the related part has failed.
Find replacement catalytic converters that match this model year in our catalog. We do not invent fitment.
Find replacement partsDirect mentions are NHTSA owner narratives that contain this component or an accepted alias. Related-system counts are complaints in a mapped category that do not name the part. They are never merged. Mileage statistics use odometer values from 1 to 400,000 miles. This is not a failure rate.