Service bulletins for the 2018 Volkswagen Atlas
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
821 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Catalytic converter are shown. Show all
| DC_26M4_26N6 | 2022-09-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. Over time and mileage, the factory-installed catalyst may not perform as required. If the effectiveness of the catalyst is reduced, this may result in increased tailpipe emissions and the vehicle could fail an emissions (IM) inspection. Removed requirement for adding a zip tie to the catalyst core REMINDER: The catalysts MUST be separated from the exhaust system for recycling. |
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| Circ 26N6_REV5 | 2022-09-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. Over time and mileage, the factory-installed catalyst may not perform as required. If the effectiveness of the catalyst is reduced, this may result in increased tailpipe emissions and the vehicle could fail an emissions (IM) inspection. Removed requirement for adding a zip tie to the catalyst core REMINDER: The catalysts MUST be separated from the exhaust system for recycling. |
| Circ 26M4_REV5 | 2022-09-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. "Over time and mileage, the factory-installed catalyst may not perform as required. If the effectiveness of the catalyst is reduced, this may result in increased tailpipe emissions and the vehicle could fail an emissions (IM) inspection. Removed requirement for adding a zip tie to the catalyst core. REMINDER: The catalysts MUST be separated from the exhaust system for recycling. |
| Circular26N6REV2 | 2020-10-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. "Over time and mileage, the factory-installed catalyst may not perform as required. If the effectiveness of the catalyst is reduced, this may result in increased tailpipe emissions and the vehicle could fail an emissions (IM) inspection. • Updated claiming instructions and part information with Criteria M1 information. • Updated claiming and work instructions to include rivet (N -038-549-4) for the noise insulation. Due to a change in the repair manual, this rivet is now a mandatory replacement part. • Updated work instructions to include a caution about working with exhaust fasteners. " |
| Circular26M4REV2 | 2020-10-06. Service bulletin. EQUIPMENT:MECHANICAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. "Over time and mileage, the factory-installed catalyst may not perform as required. If the effectiveness of the catalyst is reduced, this may result in increased tailpipe emissions and the vehicle could fail an emissions (IM) inspection. Updated claiming instructions and part information with Criteria M1 information. Updated claiming and work instructions to include rivet (N -038-549-4) for the noise insulation. Due to a change in the repair manual, this rivet is now a mandatory replacement part. Updated work instructions to include a caution about working with exhaust fasteners. |
| V0120012058261_1 | 2020-03-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. Catalytic converter hardware improved for long-term durability. ECM software improved to reduce thermal stress on catalytic converter, prevent erroneous EVAP leak faults, and prevent erroneous fuel trim faults. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.