This page covers 3 recalls and 10 owner complaints for the 2010 BMW Z4.
For the 2010 BMW Z4, the small complaint set points most clearly to engine behavior issues. Owners most frequently report problems in the engine and engine cooling system, with the most common symptom being unexpected engine stalls while driving, in some cases recurring even after a repair attempt. A separate report describes the vehicle losing speed on its own at highway speeds without any warning lights, with a dealer diagnosing a transmission fault. One owner reports a windshield fogging issue during cold, wet weather where the defroster appeared to worsen visibility rather than clear it, with no usable heat available. The complaint volume here is low, so these patterns reflect a small sample, but engine stalling during normal driving is the thread that comes up most consistently across multiple reports.
10
Total Complaints
By System
The 2010 BMW Z4 has 3 recalls, the most serious being two related issues that can cause an underhood fire — a PCV valve heater that can short circuit and overheat, potentially igniting nearby components whether the car is moving, parked after a drive, or even sitting overnight.
The PCV valve fire risk has been the subject of more than one recall campaign, indicating that prior repair attempts did not fully resolve the issue; owners should confirm their specific vehicle has received the most current remedy. On the engine performance side, the variable valve timing system contains bolts that can loosen or break, causing the engine to stall without warning. A sudden stall at highway speeds or in an intersection removes power steering and braking assist, raising the risk of a crash.
At a glance
What can fail
The aluminum bolts securing the variable camshaft timing adjustment housing can loosen and break over time, potentially causing the unit to fail.
What the fix does
Dealers will replace all four VANOS bolts at no cost to you.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The heater for the positive crankcase ventilation valve may short circuit, potentially causing an electrical fault.
What the fix does
Dealers will install a new electrical wiring harness with fuse protection for the PCV valve heater at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The heater inside the positive crankcase ventilation valve may short circuit, potentially causing it to malfunction.
What the fix does
Dealers will replace the PCV valve heater at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
