# Warranty extension EW\-Exhaust Valve Assembly

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: Warranty extension
- NHTSA id: 11031590
- Published by NHTSA: 2026\-04\-27
- Manufacturer's number: EW\-Exhaust Valve Assembly
- Manufacturer's date: 2023\-09\-06
- NHTSA component: ENGINE

## NHTSA's summary

This NCU replaces the prior NCU issued on March 10, 2023, and contains clarification on reimbursement timeline and removal of damage codes related to intake valves/guide. In our continuing efforts to assure the proper performance of Mercedes\-Benz products and to enhance the satisfaction of our customers, Mercedes\-Benz USA, LLC \("MBUSA"\) is extending the warranty coverage on the exhaust valve system in certain Model Year \("MY"\) vehicles listed below as follows: MY 2011: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 12 years / 120,000 miles \(whichever occurs first\) MY 2012: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 11 years / 120,000 miles \(whichever occurs first\) MY 2013 \- MY 2016: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 10 years / 120,000 miles \(whichever occurs first\) This extended warranty applies to the following condition that may necessitate the repair or replacement of components related to the exhaust valve assembly \(e.g. exhaust valve, cylinder head\) related to: •Over time, increased lateral forces may lead to wear in the valve guide and/or seat ring. This issue could potentially cause combustion misfire for cylinder 1 through 8 \(right and/or left cylinder head\), resulting in an activation of the check engine Malfunction Indicator Lamp \("MIL"\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-11031590-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-11031590-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2013 to 2015 MERCEDES\-BENZ AMG E63S
- 2013 to 2015 MERCEDES\-BENZ AMG G63
- 2016 MERCEDES\-BENZ AMG GLE63
- 2012 to 2015 MERCEDES\-BENZ AMG ML63
- 2013 to 2016 MERCEDES\-BENZ AMG S63
- 2015 to 2016 MERCEDES\-BENZ AMG S63 4MATIC
- 2016 MERCEDES\-BENZ AMG SL63
- 2011 to 2014 MERCEDES\-BENZ CL550
- 2011 to 2014 MERCEDES\-BENZ CL63
- 2016 MERCEDES\-BENZ CLS 550
- 2016 MERCEDES\-BENZ CLS 63S
- 2012 to 2015 MERCEDES\-BENZ CLS550
- 2012 to 2015 MERCEDES\-BENZ CLS63
- 2014 to 2015 MERCEDES\-BENZ CLS63S
- 2012 to 2016 MERCEDES\-BENZ E550
- 2012 to 2016 MERCEDES\-BENZ E63
- 2013 to 2015 MERCEDES\-BENZ G63
- 2013 to 2016 MERCEDES\-BENZ GL450
- 2013 to 2016 MERCEDES\-BENZ GL550
- 2013 to 2016 MERCEDES\-BENZ GL63
- 2016 MERCEDES\-BENZ GLE63S
- 2012 to 2015 MERCEDES\-BENZ ML550
- 2011 to 2016 MERCEDES\-BENZ S550
- 2011 to 2012 MERCEDES\-BENZ S63
- 2014 to 2016 MERCEDES\-BENZ S63
- 2013 to 2016 MERCEDES\-BENZ SL550
- 2013 to 2015 MERCEDES\-BENZ SL63

JSON: [/v1/bulletins/11031590](/v1/bulletins/11031590)

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