Tesla Model S vs. BMW 4-Series Reliability: Real-world reliability data

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Year	Make/Model	Repair Trips Per 100 Cars	Compared to all models for the same year
2018	BMW 4-Series		small sample, members only	see reported repairs
	13 4-Series, 5.8 months of data per 4-Series, average 3500 miles * Very small sample, members only.

2017	BMW 4-Series	14	Fewest Trips Most Trips	see reported repairs
	28 4-Series, 9.5 months of data per 4-Series, average 8400 miles
2017	Tesla Model S	40	Fewest Trips Most Trips	see reported repairs
	49 Model Ss, 9.8 months of data per Model S, average 14500 miles

2016	BMW 4-Series	26	Fewest Trips Most Trips	see reported repairs
	64 4-Series, 10.0 months of data per 4-Series, average 18900 miles Most of the cars in the sample are the related 3-Series, which has had finish and trim problems following an update.
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	BMW 4-Series	23	Fewest Trips Most Trips	see reported repairs
	85 4-Series, 8.7 months of data per 4-Series, average 28200 miles Most of the cars in the sample are the related 3-Series.
2015	Tesla Model S	80	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	BMW 4-Series	45	Fewest Trips Most Trips	see reported repairs
	96 4-Series, 9.2 months of data per 4-Series, average 43800 miles Most of the cars in the sample are the related 3-Series.
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	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	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.

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Tesla Model S vs. BMW 4-Series Reliability Comparisons

You won't find Tesla Model S or BMW 4-Series 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 4-Series truly differ in reliability.

These stats have been promptly updated four times a year, to much more closely track Tesla Model S and BMW 4-Series reliability as the cars age. Others tell you how reliable the Tesla Model S and the BMW 4-Series 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 4-Series have been recently.

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

Tesla Model S vs. BMW 4-Series Repair Frequencies

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Tesla Model S vs. BMW 4-Series Reliability Comparisons