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Porsche Boxster vs. BMW Z3 Reliability

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Results are for year ending December 31, 2015. 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    
2015 Porsche Boxster   small sample, members only   see reported repairs
  16 Boxsters, 8.4 months of data per Boxster, average 4800 miles

* Small sample, members only.

 

2014 Porsche Boxster 11
2.74725274725% 2.74725274725% Fewest Trips Most Trips
[?] see reported repairs
  46 Boxsters, 9.6 months of data per Boxster, average 13000 miles

Like other sports cars, low average odometer reading.

 

2013 Porsche Boxster 24
25.8620689655% 25.8620689655% Fewest Trips Most Trips
[?] see reported repairs
  43 Boxsters, 10.3 months of data per Boxster, average 14600 miles

Like other sports cars, low average odometer reading.

 

2009 Porsche Boxster   small sample, members only   see reported repairs
  16 Boxsters, 9.3 months of data per Boxster, average 42000 miles

* Small sample, members only.

 

2008 Porsche Boxster 38
22.8862973761% 22.8862973761% Fewest Trips Most Trips
[?] see reported repairs
  46 Boxsters, 9.7 months of data per Boxster, average 42400 miles

Like other sports cars, low average odometer reading.

 

2007 Porsche Boxster 41
20.4081632653% 20.4081632653% Fewest Trips Most Trips
[?] see reported repairs
  38 Boxsters, 9.9 months of data per Boxster, average 54200 miles

Like other sports cars, low average odometer reading.

 

2006 Porsche Boxster 30
8.64661654135% 8.64661654135% Fewest Trips Most Trips
[?] see reported repairs
  37 Boxsters, 9.7 months of data per Boxster, average 58600 miles

Like other sports cars, low average odometer reading.

 

2005 Porsche Boxster 42
17.9156908665% 17.9156908665% Fewest Trips Most Trips
[?] see reported repairs
  37 Boxsters, 10.1 months of data per Boxster, average 66400 miles

Redesigned. Like other sports cars, low average odometer reading.

 

2004 Porsche Boxster   small sample, members only   see reported repairs
  19 Boxsters, 10.6 months of data per Boxster, average 55500 miles

* Small sample, members only.

 

2003 Porsche Boxster 55
20.4761904762% 20.4761904762% Fewest Trips Most Trips
[?] see reported repairs
  36 Boxsters, 9.1 months of data per Boxster, average 72000 miles

Like other sports cars, low average odometer reading.

 

2002 Porsche Boxster 46
13.619047619% 13.619047619% Fewest Trips Most Trips
[?] see reported repairs
  26 Boxsters, 10.1 months of data per Boxster, average 77800 miles

Like other sports cars, low average odometer reading.

 

2001 BMW Z3 48
12.8571428571% 12.8571428571% Fewest Trips Most Trips
[?] see reported repairs
  28 Z3s, 9.9 months of data per Z3, average 82900 miles

Like other sports cars, low average odometer reading.
2001 Porsche Boxster 57
19.2857142857% 19.2857142857% Fewest Trips Most Trips
[?] see reported repairs
  38 Boxsters, 10.6 months of data per Boxster, average 87400 miles

Like other sports cars, low average odometer reading.

 

2000 BMW Z3   small sample, members only   see reported repairs
  18 Z3s, 6.2 months of data per Z3, average 90900 miles

* Small sample, members only.
2000 Porsche Boxster   small sample, members only   see reported repairs
  20 Boxsters, 5.7 months of data per Boxster, average 95500 miles

* Small sample, members only.

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Porsche Boxster vs. BMW Z3 Reliability Comparisons

You won't find Porsche Boxster or BMW Z3 reliability information like this anywhere else. Actual repair frequencies, not just vague dots, to make it clear how much the Porsche Boxster and the BMW Z3 truly differ in reliability.

These stats are promptly updated four times a year, to much more closely track Porsche Boxster and BMW Z3 reliability as the cars age. Others tell you how reliable the Porsche Boxster and the BMW Z3 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 Porsche Boxster and the BMW Z3 have been recently.

What People Are Saying about Reliability and the Porsche Boxster

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What Our Members Are Saying about the Reliability and Durability of the Porsche Boxster

Porsche Boxster Reliability and Durability: Pros
YearBody/PowertrainComment
2005 2dr Convertible 240-horsepower 2.7L H6
5-speed shiftable automatic RWD
Consumer Reports rated it a Best Buy with better than average repair history. Owned for 3 years (bought new) and have had no major problems. Even for minor problems, if >1 day in the shop, they either gave me a loaner or a free rental car.
Porsche Boxster Reliability and Durability: Cons
YearBody/PowertrainComment
2008 2dr Convertible 295-horsepower 3.4L H6
6-speed manual RWD
prone to repair issues
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed shiftable automatic RWD
these cars have a history of not getting high mileage without having major engine problems. and the cost to rplce the motor is more than the value of the car after repairs. so far I have not had major problems myself.
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed manual RWD
No complaints so far.Rumors of 2000 to 2008 motors have a 27 percent chance of blowing due to faulty design of a two piece crankshaft.However many ,many Boxsters have up to 175,000 on them
2001 2dr Convertible 250-horsepower 3.2L H6
6-speed manual RWD
The M96 engine is known to virtually explode due to the IMS bearing issue. this can be avoided with (1) much more frequent oil changes than manufacturer recommends, plus analysis of oil and filter aftert every change. 5k miles instead of 15k miles, even with Mobil 1. There are after market upgrades to avoid the IMS failures. This can be done by most any independent Porsche mechanic and there are multiple products on the market. I recommend L&N Engineering's solutions 10 to 1 over any other fix, although it is the more expensive option. If you plan to buy a used Boxster, pre 2009, budget an extra 3000 for an IMS shafte upgrade or ceramic bearing replacement. You can then have years of trouble free engine performance. There is also a product called the guardian that will give you advance warning of an impending failure, but i RECOMMEND JUST GETTING IT FIXED!
 

What Our Members Are Saying about the Reliability and Durability of the BMW Z3

BMW Z3 Reliability and Durability: Pros
YearBody/PowertrainComment
2000 2dr Convertible 170-horsepower 2.5L I6
4-speed automatic RWD
Car of the year in 2000. Best Consumer Reports value for 5 years in a row for its class. Model Rating - Overall 4 stars Trim Rating - Overall 5 stars Appearance 5 stars Comfort 5 stars Performance 5 stars Reliability 5 stars
2000 2dr Convertible 193-horsepower 2.8L I6
4-speed automatic RWD
I got over a 150K miles and only minor items less then $500 dollars on repairs other then tires and brakes
BMW Z3 Reliability and Durability: Cons
YearBody/PowertrainComment
2000 2dr Convertible 193-horsepower 2.8L I6
5-speed manual RWD
I experienced continued problems with the A/C system and the engine cooling system. Also, the rag top did not hold up well and developed a leak.