Your BMW 4 Series isn’t just a car. It’s a finely tuned machine, built to give you a ride like no other. But even the best cars run into trouble—and when they do, you want to know what you’re up against. At Cowden Automotive, right here in San Francisco, we’ve seen it all. We’ve got the knowledge, the tools, and the expertise to keep your 4 Series running smoothly. So, what are the most common issues that can mess with your BMW? Let’s dive in.
1. Oil Leaks – A Slippery Situation
First up: oil leaks. BMW 4 Series models from 2014 to 2019 are notorious for this. The valve cover gasket and oil filter housing gaskets tend to crack over time, leaking oil onto your engine. And no, it’s not just a few drops. Left unchecked, this can lead to overheating or worse—serious engine damage.
The Fix:
Get those gaskets replaced. At Cowden Automotive, we’ll check for leaks, replace those tired gaskets, and make sure no further damage sneaks up on you.
2. Timing Chain Trouble – The Silent Killer
Here’s where things get serious. If you’ve got a 2013-2017 BMW 4 Series with an N20 or N26 engine, listen up. The timing chain is prone to stretching or breaking around the 60,000-mile mark. Hear a rattling noise? That’s not the radio—it’s your engine begging for help.
The Fix:
Bring your car in yesterday. Replacing the timing chain before it fails can save you from a complete engine breakdown. Cowden Automotive’s team knows these engines inside out and can get you back on the road before disaster strikes.
3. Turbocharger Failures – Power Goes Poof
Turbochargers are a blast—until they stop working. The 428i models from 2014-2016 often suffer from turbo failures. Whether it’s from oil starvation or overheating, you’ll notice a sudden loss of power or see more smoke than usual pouring out of your exhaust.
The Fix:
Routine oil changes are your best friend here. But if the turbo’s already toast, we’ve got the parts and the expertise at Cowden Automotive to swap it out and get that boost back.
4. Electrical Gremlins – Flickering Nightmare
Infotainment glitches, dash warnings out of nowhere, or lights that just won’t behave. Sound familiar? BMW 4 Series models from 2015-2018 are known for electrical issues, often caused by faulty wiring or outdated software.
The Fix:
At Cowden Automotive, we’ve got the latest diagnostic tools to find and fix these electrical quirks. Whether it’s a simple software update or deeper wiring work, we’ll keep your car’s tech in check.
5. Brake Wear – Stopping You in Your Tracks
If you’ve been driving a high-performance BMW like the 435i (2014-2016), you’ve probably noticed the brakes wear out quicker than on other cars. Squealing noises? Shuddering when you stop? Time to look at those pads and rotors.
The Fix:
Don’t wait until you can’t stop. We’ll replace your worn brakes with OEM parts at Cowden Automotive, ensuring your 4 Series has the stopping power it was born with.
6. Water Pump and Thermostat – Cooling Gone Wrong
Overheating? Blame the water pump or thermostat. These parts are known to fail on 2013-2019 BMW 4 Series models, leaving you with a dangerously hot engine.
The Fix:
We’ll inspect and replace any failing components in your cooling system, making sure your BMW stays cool under pressure.
7. Suspension Issues – The Rough Ride
Feeling every bump on the road? The suspension, especially the front control arm bushings, tends to wear out on 2014-2018 models. Your smooth ride suddenly isn’t so smooth anymore.
The Fix:
Cowden Automotive can replace worn suspension parts and restore the comfort and handling you expect from a BMW.
When it comes to the BMW 4 Series, the key to keeping your car running smoothly is knowing the issues before they get out of hand. From oil leaks to turbo failures, Cowden Automotive in San Francisco has seen it all. Our team is ready to tackle any problem, ensuring your BMW stays at peak performance. Need help with your BMW? Schedule a service at Cowden Automotive, serving San Francisco and nearby cities like Fremont and Newark.
Is your BMW showing signs of trouble? Don’t wait for it to get worse—contact Cowden Automotive today for expert care.
