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Tesla Model S vs. BMW Z4 Repair Frequencies

Results are for year ending June 30, 2018. Only successfully completed repairs are currently included in the analysis. Routine maintenance, most wear items, recalls, and problems fixed with just a reflash or warning light reset are not included.
Year Make/Model Repair Trips Per 100 Cars Compared to all models for the same year    
2017 Tesla Model S 40
92.857142857143% 92.857142857143% Fewest Trips Most Trips
see reported repairs
  49 Model Ss, 9.8 months of data per Model S, average 14500 miles

 

2016 Tesla Model S   small sample, members only   see reported repairs
  20 Model Ss, 9.9 months of data per Model S, average 26500 miles

* Small sample, members only.

 

2015 Tesla Model S 80
100% 100% Fewest Trips Most Trips
see reported repairs
  50 Model Ss, 10.2 months of data per Model S, average 37500 miles

Most repairs involve fit and finish issues.

 

2014 Tesla Model S   small sample, members only   see reported repairs
  24 Model Ss, 9.3 months of data per Model S, average 41800 miles

* Small sample, members only.

 

2013 Tesla Model S 56
88.916256157635% 88.916256157635% Fewest Trips Most Trips
see reported repairs
  49 Model Ss, 10.1 months of data per Model S, average 63000 miles

Includes some 2012s. Most of the reported problems are minor: wind noise, creaks, rattles. But also a few drive unit and battery pack replacements. Owners report outstanding service quality.

 

2012 Tesla Model S 56
65.057915057915% 65.057915057915% Fewest Trips Most Trips
see reported repairs
  49 Model Ss, 10.1 months of data per Model S, average 63000 miles

New design, summer introduction. Combined with the 2013.

 

2007 BMW Z4   small sample, members only   see reported repairs
  17 Z4s, 10.9 months of data per Z4, average 65700 miles

* Small sample, members only.

 

2006 BMW Z4   small sample, members only   see reported repairs
  19 Z4s, 10.7 months of data per Z4, average 54800 miles

* Small sample, members only.

 

2005 BMW Z4   small sample, members only   see reported repairs
  13 Z4s, 11.0 months of data per Z4, average 80900 miles

* Very small sample, members only.

 

2004 BMW Z4   small sample, members only   see reported repairs
  10 Z4s, 11.4 months of data per Z4, average 91300 miles

* Very small sample, members only.

 

2003 BMW Z4   small sample, members only   see reported repairs
  24 Z4s, 9.6 months of data per Z4, average 84500 miles

* Small sample, members only.

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Tesla Model S vs. BMW Z4 Reliability Comparisons

You won't find Tesla Model S or BMW Z4 reliability information like this anywhere else. Actual repair frequencies, not just vague dots, to make it clear how much the Tesla Model S and the BMW Z4 truly differ in reliability.

These stats have been promptly updated four times a year, to much more closely track Tesla Model S and BMW Z4 reliability as the cars age. Others tell you how reliable the Tesla Model S and the BMW Z4 were a year ago, when the cars were a year younger and had 12,000 fewer miles on them. Only TrueDelta tells you how reliable the Tesla Model S and the BMW Z4 have been recently.

See TrueDelta's information for all Hatchbacks and Convertibles.
See TrueDelta's information for all Tesla models and BMW models.