Top 3 Common BMW i3 Issues (And How to Spot Them)
The BMW i3 is a smart, eco-friendly electric vehicle known for its unique design and smooth driving experience. While it’s a well-engineered car, like any vehicle, it comes with a few common issues owners should be aware of.
At CG Motorsports, we’ve seen our fair share of BMW i3s in the shop, and several recurring problems show up consistently. Here’s a breakdown of the three most common issues with the BMW i3, what symptoms to watch for, and when it’s time to bring your vehicle in for service.
1. 12V Battery Failure - The Famous Drivetrain Malfunction Warning
What it is:
The BMW i3 uses a small 12V auxiliary battery alongside its main high-voltage battery. This 12V battery powers essential electronics, safety systems, and control modules. When it begins to fail, it can trigger a “Drivetrain Malfunction” warning and, in some cases, leave the vehicle inoperable — even if the high-voltage battery is fully charged.
Signs to watch for:
- “Drivetrain Malfunction” message on the dashboard
- Sudden loss of power while driving
- Vehicle won’t start or powers off shortly after starting
- Electrical glitches such as keyless entry malfunctions, random dashboard warning lights, and the security alarm triggering without cause
Recommended action:
If you experience any of these symptoms or see a drivetrain malfunction warning, it’s essential to have the 12V battery tested and replaced immediately. At CG Motorsports, we stock the correct OEM (Original Equipment Manufacturer) 12V batteries for the BMW i3 and handle system resets to ensure your vehicle is safe and reliable.
2. AC Compressor Failure
What it is:
The i3’s electric air conditioning compressor manages both cabin cooling and high-voltage battery temperature control. Over time, especially in warmer climates or with infrequent use, these compressors can fail.
Signs to watch for:
- Weak or no cold air coming from the vents
- Unusual buzzing, clicking, or rattling sounds when the AC is running
- High-voltage battery overheating warnings, especially on hot days
- HVAC or battery cooling system error messages
Recommended action:
A faulty AC compressor affects more than just cabin comfort. It can impact battery health and overall vehicle performance. If your air conditioning isn’t working properly or you hear unusual noises when it’s on, it’s time to have it inspected. Our technicians at CG Motorsports are fully equipped to diagnose and repair BMW i3 AC systems.
3. Motor Mount Wear
What it is:
The i3’s drivetrain relies on motor mounts to hold everything securely in place while minimizing vibration. These mounts can wear out over time, especially in areas with rough roads or stop-and-go traffic, causing excessive movement and noise in the drivetrain.
Signs to watch for:
- Clunking or knocking noises when accelerating, braking, or shifting between drive and reverse
- Noticeable drivetrain vibration inside the cabin
- Harsh or uneven ride, especially over bumps
- Visible damage or sagging in the motor mounts during inspection
Recommended action:
Ignoring worn motor mounts can lead to further damage to the drivetrain and uncomfortable driving. If you notice new noises, vibrations, or changes in ride quality, it’s best to have your mounts inspected.
At CG Motorsports, we offer expert motor mount inspections and replacements for BMW i3 models, including upgrades from the original plastic arms to metal arms.
Book Your BMW i3 Service with CG Motorsports
If you’re experiencing any of these common BMW i3 issues, or if your vehicle’s warning lights are on, don’t wait. CG Motorsports is Richmond’s trusted European vehicle specialist, with years of experience servicing BMW, MINI, and other European models.
We offer comprehensive diagnostics, repairs, and maintenance for BMW i3s, including 12V battery replacements, AC repairs, and drivetrain services.
Contact us today to book your BMW i3 diagnostic or service appointment.
Located in Richmond, BC, we proudly serve customers across the Greater Vancouver area.
