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Service bulletin NTB12120A

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10192437
Published by NHTSA2021-05-10
Manufacturer's numberNTB12120A
Manufacturer's date2014-09-05
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

NHTSA's summary

SERVICE INFORMATION When an exhaust manifold and three way catalyst assembly is removed from an applied vehicle for any reason: 1. Remove and discard the exhaust manifold stay and its related parts. 2. The upper and lower exhaust manifold covers (heat shields) may need to be replaced. - Refer to the FLOW CHART on page 3 for detailed vehicle applicability. See this bulletin for further detail.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Exhaust and emissions, Exhaust manifold, pipes and muffler

Vehicles listed
NISSAN ALTIMA2007, 2008, 2009, 2010
NISSAN ALTIMA HYBRID2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
NTB08001B2021-05-10. Service bulletin. see NTB13-056 INTRODUCTION Nissan has determined that on some 2007 ? 2008 Altima Sedans and 2008 Altima Coupes equipped with the 2.5 liter four cylinder engines, a rattle noise may occur around the exhaust manifold heat shield during start up or at low engine speeds (approximately 1600 RPM). The symptom does not affect the operation of the engine or the vehicle. To address this issue, Nissan is conducting a Voluntary Service Campaign to replace the lower exhaust manifold heat shield. IDENTIFICATION NUMBER Nissan has assigned identification number PB053 to this campaign. This number must appear on all communications and documentation of any nature dealing with this campaign. See this bulletin for further detail.
NTB-12-120-A2014-11-14. Service bulletin. NISSAN: INFORMATION PROVIDED REGARDING REMOVAL OF THREE WAY CATALYST AND EXHAUST MANIFOLD SERVICE AND REPLACEMENT, IF NEEDED, OF UPPER/LOWER (HEAT SHIELD) EXHAUST MANIFOLD COVERS. MODEL 20007-10 SEDAN/COUPE, 2007-11 HYBRID. *PE
NTB-12-0922012-11-09. Service bulletin. NISSAN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE CONTROL MODULE (ECM) NEEDS INSPECTION, REPROGRAMMED AND/OR POSSIBLE REPLACED EXHAUST MANIFOLD AND FRONT EXHAUST TUBE DUE TO IMPROPER CALIBRATION DETECTING INCORRECT ENGINE VALVE CLOSURE DURING ENGINE KNOCKING. MODEL 2009 ALTIMA. *PE
NTB12-0402012-05-02. Service bulletin. NISSAN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. RECALL CAMPAIGN. SOME VEHICLES ARE EQUIPPED WITH AN IMPROPERLY CALIBRATED ENGINE CONTROL MODULE (ECM) THAT MAY INCORRECTLY DETECT ENGINE VALVE CLOSURE AS ENGINE KNOCK. *JS UPDATED 5/16/12. *PE UPDATED 5/30/12. *PE UPDATED 7/3/12. *PE