Originally Posted By: BMWTurboDzl
Old link on why you should not accept CR survey results with blind faith.
http://www.allpar.com/cr.html
Something I heard but haven't confirmed with this years rating is that the X5 diesel was noted as having fuel issues and given a "least reliable" rating. Well there are no fuel issues with the M57 diesel. The only fuel issues are with the N54 and may the N55 (both are gasoline).
Surveys are always going to have issues. The only way that you're going to get a truly accurate picture is by examining the manufacturers' warranty claims records.
I couldn't get past the first paragraph of your link. I love this bit... "If most people reported on two cars (because most families have two or more cars), that would put the response rate at a mere 6%. Even assuming one car per family - a highly dubious assumption - we have a taudry 12% response rate."
Just how does the number of vehicles (based on their insight) change the response rate?
ie;
1 x 480,000 = 480,000
1 x 4,000,000 = 4,000,000
480,000 = 12% of 4,000,000
2 x 480,000 = 960,000
2 x 4,000,000 = 8,000,000
960,000 = 12% of 8,000,000
Old link on why you should not accept CR survey results with blind faith.
http://www.allpar.com/cr.html
Something I heard but haven't confirmed with this years rating is that the X5 diesel was noted as having fuel issues and given a "least reliable" rating. Well there are no fuel issues with the M57 diesel. The only fuel issues are with the N54 and may the N55 (both are gasoline).
Surveys are always going to have issues. The only way that you're going to get a truly accurate picture is by examining the manufacturers' warranty claims records.
I couldn't get past the first paragraph of your link. I love this bit... "If most people reported on two cars (because most families have two or more cars), that would put the response rate at a mere 6%. Even assuming one car per family - a highly dubious assumption - we have a taudry 12% response rate."
Just how does the number of vehicles (based on their insight) change the response rate?
ie;
1 x 480,000 = 480,000
1 x 4,000,000 = 4,000,000
480,000 = 12% of 4,000,000
2 x 480,000 = 960,000
2 x 4,000,000 = 8,000,000
960,000 = 12% of 8,000,000