# Service bulletin Circular26N6REV3

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.

- Type: Service bulletin
- NHTSA id: 10180493
- Published by NHTSA: 2020\-10\-06
- Manufacturer's number: Circular26N6REV3
- Manufacturer's date: 2020\-09\-24
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

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, part information and work instructions with latest catalyst information.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180493-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180493-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2018 VOLKSWAGEN ATLAS

## Other bulletins for the same vehicles and component

- [V0116152014815\_20](/bulletins/11038146.md), 2026-10-06, Service bulletin: ENGINE. Suggested fuel additive
- [VWP\-26\-07](/bulletins/11035774.md), 2026-08-05, Warranty extension: ENGINE. For applicable 2018\-2022 Atlas and Atlas Cross Sport 3.6L Settlement Class Vehicles \(NA6 warranty key\), the New Vehicle Limited Warranty will be extended to cover 80% of the replacement of the Water Pump or Water Pump Gasket by an authorized Volkswagen Dealer to 8.5 years or 85,000 miles, whichever occurs first, from the vehicle’s original in\-service date.
- [VWP\-26\-07 FAQ](/bulletins/11035773.md), 2026-08-05, Warranty extension: ENGINE. Supporting FAQ for VWP\-26\-07 Main Engine Wiring Harness Limited Warranty Extension \(Class Action\)
- [V1718062017813\_24](/bulletins/11035762.md), 2026-08-05, Service bulletin: ENGINE. Oil Consumption Measurement and Electronic Oil Consumption Measurement
- [V1719012012855\_81](/bulletins/11034617.md), 2026-07-07, Service bulletin: ENGINE. Volkswagen Engine Oil Standards
- [TT 13\-20\-01\_3](/bulletins/11034614.md), 2026-07-07, Service bulletin: ENGINE. Instruction, how to lubicate engine before initial start.
- [TT 10\-18\-02\_2](/bulletins/11034613.md), 2026-07-07, Service bulletin: ENGINE. Lubricating engine components before reassembly.
- [VOS\-26\-21](/bulletins/11030847.md), 2026-04-06, Service bulletin: ENGINE. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the error message ERP0204E could occur during perform initial operation, software configuration, SVM updates for any control module\(s\) etc.
- [V0123092071325\_2](/bulletins/11027250.md), 2026-01-07, Service bulletin: ENGINE. Update Engine/Motor Control Module J623.
- [WLA\-25\-11](/bulletins/11025452.md), 2025-11-10, Service bulletin: ENGINE. Coolant Bleed Procedure

JSON: [/v1/bulletins/10180493](/v1/bulletins/10180493)

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