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BMW Z4 vs. Mazda MX-5 Miata Reliability by Model Generation

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 and Model % of Average Repair Frequency  
2016 - 2018 Mazda MX-5 Miata Reliability by Generation2016 - 2018 Mazda MX-5 Miata
22% Best 76% Worst
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2006 - 2015 Mazda MX-5 Miata Reliability by Generation2006 - 2015 Mazda MX-5 Miata
0% Best 25% Worst
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2006 - 2008 BMW Z4 Reliability by Generation2006 - 2008 BMW Z4
4.2857142857143% Best 45% Worst
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2003 - 2005 BMW Z4 Reliability by Generation2003 - 2005 BMW Z4
32.285714285714% Best 94% Worst
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What Our Members Are Saying about the Reliability And Durability of the BMW Z4

BMW Z4 Reliability And Durability: Pros
YearBody/PowertrainComment
2007 2dr Hatch 255-horsepower 3.0L I6
6-speed manual RWD
Certified pre-owned. full 2007 BMW Z4 review
2006 2dr Convertible 215-horsepower 3.0L I6
6-speed manual RWD
It has a reputation with consumer organizations for very reliable performance - a real plus when repairs on such cars are so expensive. The "certified" warranty was important to me with this in mind. full 2006 BMW Z4 review
2006 2dr Convertible 215-horsepower 3.0L I6
6-speed manual RWD
The car has the remaining new car warranty and maintenance. It is CPO to 6yr-100k miles. full 2006 BMW Z4 review
BMW Z4 Reliability And Durability: Cons
YearBody/PowertrainComment
2003 2dr Convertible 184-horsepower 2.5L I6
5-speed manual RWD
Parts(e.g., fuel pump) that would nearly outlast any domestic or foreign car make failed after only 25,000 miles. Dealer attempted to charge me nearly $2000 to replace same...said "No thanks," and took to independent garage who charged 1/3 to repair. full 2003 BMW Z4 review
 

What Our Members Are Saying about the Reliability And Durability of the BMW Z4

BMW Z4 Reliability And Durability: Pros
YearBody/PowertrainComment
2007 2dr Hatch 255-horsepower 3.0L I6
6-speed manual RWD
Certified pre-owned. full 2007 BMW Z4 review
2006 2dr Convertible 215-horsepower 3.0L I6
6-speed manual RWD
It has a reputation with consumer organizations for very reliable performance - a real plus when repairs on such cars are so expensive. The "certified" warranty was important to me with this in mind. full 2006 BMW Z4 review
2006 2dr Convertible 215-horsepower 3.0L I6
6-speed manual RWD
The car has the remaining new car warranty and maintenance. It is CPO to 6yr-100k miles. full 2006 BMW Z4 review
BMW Z4 Reliability And Durability: Cons
YearBody/PowertrainComment
2003 2dr Convertible 184-horsepower 2.5L I6
5-speed manual RWD
Parts(e.g., fuel pump) that would nearly outlast any domestic or foreign car make failed after only 25,000 miles. Dealer attempted to charge me nearly $2000 to replace same...said "No thanks," and took to independent garage who charged 1/3 to repair. full 2003 BMW Z4 review