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BMW 4-Series vs. BMW Z4 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  
2014 - 2018 BMW 4-Series Reliability by Generation2014 - 2018 BMW 4-Series
35.714285714286% Best 100% 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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