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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.

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See reliability results for all Convertibles.

See only powertrain and chassis results

Year Make/Model Repair Frequencysuccessful repair trips per 100 cars per year Compared to all models for the same year  
2014 Porsche Boxster 27 Boxsters, 4.2 months of data per Boxster, average 3900 miles11
10% Fewest Trips Most Trips
see reported repairs

 

2013 Porsche Boxster   24 Boxsters, 6.7 months of data per Boxster, average 6000 miles

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2008 Porsche Boxster 38 Boxsters, 9.3 months of data per Boxster, average 33200 miles

Like other sports cars, low average odometer reading.
31
10% Fewest Trips Most Trips
see reported repairs

 

2007 Porsche Boxster 44 Boxsters, 8.3 months of data per Boxster, average 41900 miles

Like other sports cars, low average odometer reading. Possible blip at end of CPO warranty. Have noticed this for both the Boxster and 911 across multiple model years.
53
40% Fewest Trips Most Trips
see reported repairs

 

2006 Porsche Boxster 40 Boxsters, 9.2 months of data per Boxster, average 52500 miles

Like other sports cars, low average odometer reading.
46
20% Fewest Trips Most Trips
see reported repairs

 

2005 Porsche Boxster 39 Boxsters, 9.4 months of data per Boxster, average 51300 miles

Redesigned. Like other sports cars, low average odometer reading.
43
10% Fewest Trips Most Trips
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2004 Porsche Boxster   19 Boxsters, 9.0 months of data per Boxster, average 55100 miles

* Small sample size.
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2003 Porsche Boxster 27 Boxsters, 9.6 months of data per Boxster, average 58700 miles

Like other sports cars, low average odometer reading.
60
20% Fewest Trips Most Trips
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2002 Porsche Boxster   21 Boxsters, 10.3 months of data per Boxster, average 67300 miles

* Small sample size.
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2001 BMW Z3 25 Z3s, 11.6 months of data per Z3, average 78800 miles

Like other sports cars, low average odometer reading.
58
10% Fewest Trips Most Trips
see reported repairs
2001 Porsche Boxster 44 Boxsters, 10.0 months of data per Boxster, average 87500 miles

Like other sports cars, low average odometer reading.
54
0% Fewest Trips Most Trips
see reported repairs

 

2000 BMW Z3 27 Z3s, 9.4 months of data per Z3, average 87600 miles

Like other sports cars, low average odometer reading.
38
0% Fewest Trips Most Trips
see reported repairs
2000 Porsche Boxster 25 Boxsters, 8.9 months of data per Boxster, average 94900 miles

Like other sports cars, low average odometer reading.
48
0% Fewest Trips Most Trips
see reported repairs

 

1999 BMW Z3   11 Z3s, 11.2 months of data per Z3, average 105000 miles

* Very small sample size.
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1999 Porsche Boxster   23 Boxsters, 9.2 months of data per Boxster, average 67600 miles

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What People Are Saying about Reliability and the Porsche Boxster

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What Our Members Are Saying about Porsche Boxster Reliability and Durability

Reliability and Durability of the Porsche Boxster: 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.
Reliability and Durability of the Porsche Boxster: 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!

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What Our Members Are Saying about BMW Z3 Reliability and Durability

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