Going by the numbers alone, the sleek Z4 performs very well, accelerating faster than such natural competitors as the Mercedes-Benz SLK250 and Audi TT and garnering better fuel economy -- an impressive 28 mpg overall. Another big draw is the retractable hardtop, designed such that with the top down there's little wind buffeting to threaten your hat or hairdo. However, this BMW falls short on the fun-to-drive leader board.
Alerts
There are 3 recalls on this vehicle. Learn More.

Reliability

Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead. These charts provide the most comprehensive reliability information available to consumers. Based on information received from our latest subscriber survey, our reliability history charts give you a rundown on how used vehicles are holding up in 17 potential trouble spots, ranging from the engine, transmission, and brakes to power equipment and the electrical system.

Overall Reliability
The 2009 BMW Z4 has been recalled 3 times by NHTSA. View Recalls

No Detailed Data Available

Consumer Reports obtains its reliability data from a questionnaire that is sent to subscribers. In the questionnaire, we ask subscribers to note any problems with their cars that occurred in the past 12 months. They are asked to identify problems that they considered serious (because of cost, failure, safety, or downtime).

A typical model has about 200 to 400 samples for each model year. For some model years, typically those of older or less popular cars, we do not have a large enough sample size to provide results of statistical confidence.

There are several ways in which a savvy car buyer can still research the quality of a car.

Learn more about Car Brands Reliability
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Recalls
PROVIDED BY
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV)
Oct 30 2017
An electrical short can cause the parts within the PCV valve to melt, increasing the risk of a fire, even when the vehicle is not in use.
Summary:
BMW of North America, LLC (BMW) is recalling certain 2008-2011 128i and 2007-2011 328i, 328xi, 328i xDrive, 525i, 525xi, 528i, 528xi, 530i, 530xi, X3 3.0si, X3 xDrive30i, X5 xDrive30i, Z4 3.0i, Z4 3.0si and Z4 sDrive30i vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
What should you do:
BMW will notify owners, and dealers will replace the PCV valve heater, free of charge. Interim letters were mailed on November 27, 2017. Owners will receive a second notification by the end of October 2018. Owners may contact BMW customer service at 1-800-525-7417.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 17V683000
Potential Number of Units Affected: 740561
ELECTRICAL SYSTEM
Feb 07 2013
If there is a loss of electrical power to the vehicle, the vehicle may unexpectedly stall, increasing the risk of a crash.
Summary:
BMW is recalling certain model year 2008-2012 1-Series coupes and convertibles manufactured December 2007 through September 2011; and 2007-2011 3-Series coupes and convertibles manufactured March 2007 through October 2011; 2007-2011 3-Series sedans manufactured March 2007 through October 2011; 2007-2011 3-Series sports wagons manufactured March 2007 through June 2011; and 2009-2011 Z4 vehicles manufactured March 2009 through June 2011. In February 2013, BMW recalled 504,545 vehicles. In July 2013, BMW informed the agency that it was adding 1-Series, 3-Series, and Z4 vehicles, representing an additional 12,094 vehicles. The total number of vehicles being recalled is now 516,791. The connector for the positive battery cable connector and the corresponding terminal on the fuse box may degrade over time. Over time, the high current flow and heat from electrical resistance may lead to a breakage of the connection, and a loss of electrical power to the vehicle.
What should you do:
BMW will notify owners, and dealers will replace the positive battery cable connector and secure it with an improved method, free of charge. The recall began on March 13, 2013. Owners may call BMW at 1-800-525-7417 or email BMW at CustomerRelations@bmwusa.com.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 13V044000
Potential Number of Units Affected: 516791
ELECTRICAL SYSTEM:WIRING
Aug 11 2009
INCREASED ELECTRICAL RESISTANCE IN THAT CIRCUIT COULD CAUSE THE SAFETY BELT TENSIONER TO FAIL TO DEPLOY IN A CRASH, POSSIBLY RESULTING IN INCREASED INJURY TO THE SEAT OCCUPANT.
Summary:
BMW IS RECALLING CERTAIN MODEL YEAR 2009 Z4 30I AND 35I VEHICLES MANUFACTURED BETWEEN MARCH 10 AND MARCH 19, 2009. A DEFECTIVE CRIMP CONNECTOR IN A BELT TENSIONER WIRING PLUG MAY LEAD TO INCREASED ELECTRICAL RESISTANCE OF THAT CONNECTION.
What should you do:
THE SAFETY BELT TENSIONER WIRING WILL BE REPAIRED FREE OF CHARGE. THE RECALL BEGAN ON SEPTEMBER 5, 2009. OWNERS MAY CONTACT BMW CUSTOMER RELATIONS AT 1-800-525-7417.
For more information:
OWNERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO <A HREF=HTTP://WWW.SAFERCAR.GOV>HTTP://WWW.SAFERCAR.GOV</A> .
NHTSA CAMPAIGN ID Number: 09V327000
Potential Number of Units Affected: 195
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