Editing Nissan QR engine (section)

===General references===
* [http://www.nissannews.com/nissan/2007vehicles/altima/overview.shtml "2007 Nissan Altima overview"]
* [https://web.archive.org/web/20100409075442/http://www.nissannews.com/nissan/2007vehicles/altima/specs.shtml "2007 Nissan Altima specifications"]
* [http://www.nissannews.com/nissan/2006vehicles/frontier/specs.shtml "2006 Nissan Frontier specifications]
* [http://www.nissannews.com/nissan/2006vehicles/sentra/specs.shtml "2006 Nissan Sentra specifications"]
* [http://www.nissan-techinfo.com/nissan/TSB/TSB_xml/nmabstract.asp?mscssid=&VdocID=54354&phydoc=Y&FileName=1\R\F\1RF28.PDF&VRefNo=NTB03070 "NTB03070 Nissan technical service bulletin regarding engine precatalyst failure"]
* [http://www.nissanhelp.com/Ownership/Bulletins/Nissan/2006/NTB06-045.htm "NTB06045 Nissan technical service bulletin regarding low oil levels"]
* [http://www.nissan-techinfo.com/nissan/TSB/TSB_xml/nmabstract.asp?mscssid=&VdocID=54792&phydoc=Y&FileName=1\R\Q\1RQ26.PDF&VRefNo=NTB05058 "NTB05058 Nissan technical service bulletin regarding power valve screws"]
* [http://www.sportcompactcarweb.com/editors/technobabble/0112scc_technobabble/ "Technobabble: December 2001] by Dave Coleman, "SportCompactCar", December 2001, retrieved June 26, 2006