NHTSA (USA)Critical
At a glance
What can fail
The heater for the positive crankcase ventilation valve may short circuit, potentially causing an electrical fault.
This page covers 6 recalls, 29 owner complaints and EPA fuel economy for the 2012 BMW 128i.
21–22 mpg combined
10.7–11.2 L/100km
Subcompact Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 2 tested variants for this model year.
The dominant complaint pattern for the 2012 BMW 128i centers heavily on the airbag system, which accounts for the large majority of reports filed for this model year. Owners frequently describe concerns with airbag readiness and deployment behavior, though the specific symptoms vary across reports. Engine complaints are far fewer but worth noting, a handful of owners report rough idle, RPM fluctuations, and stalling, with some describing the engine revving erratically after coming to a stop. One report specifically mentions VANOS-related hardware found loose inside the oil pan, which is an isolated finding rather than a recurring theme. The RPM instability and stalling pattern, while limited in volume, appears in more than one report and tends to surface around idle or low-speed driving conditions.
29
Total Complaints
2
Crash-Related
1
With Injuries
By System
The 2012 BMW 128i has 6 recalls, the most serious being a driver's frontal airbag inflator that can rupture in a crash and send metal fragments into the cabin, posing a risk of serious injury or death.
Two separate filings cover this same airbag inflator defect, and prior repair attempts did not fully resolve the issue for all affected vehicles, which is why multiple campaigns exist. Beyond the airbag, there are two fire-related electrical concerns. The blower-regulator wiring harness can overheat and melt its connectors, creating a fire risk even when the car is parked and unattended. Separately, the crankcase ventilation valve contains a small heater that can develop an electrical short and overheat, raising the risk of fire both while driving and shortly after parking. A third electrical problem involves the fuse and circuit breaker system: a failure there can cut power to the vehicle entirely, causing an unexpected stall and raising the risk of a crash. On the engine side, certain connecting bolts in the engine can loosen or break, causing a loss of power or a stall while driving, which also raises crash risk.
At a glance
What can fail
The heater for the positive crankcase ventilation valve may short circuit, potentially causing an electrical fault.
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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 →
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 driver frontal air bag inflator may explode due to chemical breakdown after prolonged exposure to humidity, heat, and temperature changes.
What the fix does
Replace the driver air bag inflator. On X5 and X6 models, only the inflator is replaced. Repair is free.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The wiring and electrical connectors in the blower-regulator wiring harness may overheat.
What the fix does
Dealers will inspect and replace the blower-regulator wiring harness with a new part at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver's front air bag inflator may build up excessive pressure and rupture when the air bag deploys.
What the fix does
Dealers will replace the driver's front air bag module or inflator at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The bolts securing the variable camshaft timing adjustment (VANOS) housing can loosen over time and may break.
What the fix does
Dealers will replace all four VANOS housing bolts for both intake and exhaust units at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The connector linking the positive battery cable to the fuse box can degrade over time. High current and heat from electrical resistance may break this connection, cutting electrical power to the vehicle.
What the fix does
Dealers will replace the positive battery cable connector and secure it using an improved method at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.