At M & R Auto in Menlo Park, we understand the frustrations BMW owners face when their prized vehicles develop issues. BMWs are finely crafted machines, but even these venerable autos develop problems over time.

If you’re a BMW 5 Series owner in Atherton or the surrounding region, we have the expertise to diagnose and repair the most common problems these vehicles face. Read on to learn about the major issues we see in our Menlo Park service bays, and why prompt attention from our ASE-certified technicians is key to avoiding bigger headaches down the road.

Valve Cover Oil Leaks

Oil leaks stemming from the valve cover gasket are among the most frequent issues we see in certain 5 Series models, particularly those from 1997, 1999, 2000, 2009, 2011, and 2012. These leaks occur when the gasket deteriorates over time, allowing oil to drip onto the engine block.

Signs of a valve cover leak include:

  • Oil spots underneath your BMW after parking
  • Burning oil smell from the engine bay
  • Low oil level between changes

If left unchecked, oil leaks can lead to reduced oil pressure and accelerated engine wear. But the good news is this repair doesn’t have to break the bank. Our technicians will thoroughly clean the affected area and replace the worn gasket, getting your ultimate driving machine back on the road.

Faulty Fuel Pumps

Faulty in-tank fuel pumps are a known issue with the E60 5 Series models like the 535i. These pumps are immersed in the gas tank itself, supplying the proper fuel pressure to the injection system.

Symptoms of a bad fuel pump include:

  • Poor acceleration
  • Loss of power under load
  • Intermittent stalling
  • Check engine light

Replacing these pumps requires safely removing the gas tank to access the pump module. With our advanced tools and lifts, we make this complex job efficient. Our techs will install a robust aftermarket replacement pump, restoring smooth performance.

Worn Timing Chains

Another common and rather serious issue we see stems from the timing chain system. The chains on certain BMW M47 and N47 turbo-diesel engines can unexpectedly snap after fairly low mileage. When this happens, the pistons and valves crash into each other, causing extensive engine damage.

Warning signs include:

  • Rattling noises from engine bay
  • Difficult starts
  • Rough idling

Replacement chains and tensioners from BMW can run $2,500 in parts alone. That’s why we turn to quality aftermarket components that meet or exceed OE specifications for a fraction of the price. Once installed, accurate timing is verified using advanced computer diagnostics.

Suspension Wear

Like any vehicle, BMWs experience suspension wear over years of potholes and bumpy San Francisco Bay Area roads. Common symptoms pointing to worn components like ball joints, control arm bushings, struts, and shocks include:

  • Uneven tire wear
  • Pulling to one side
  • Bouncy ride
  • Clunking when going over bumps

Worn suspension parts impact handling and control. Our techs will thoroughly inspect each related component, provide upfront pricing options, and make recommendations for repairs based on your budget and needs. From basic shock replacement to full suspension overhaul, we have you covered.

Additional Issues

Other problems we frequently service on BMW 5 Series models include:

  • iDrive System Glitches: Early production iDrive systems can suffer electrical and mechanical gremlins impacting stereo, climate and phone controls. Our experienced techs are well-versed in diagnosing and repairing these temperamental systems.
  • Sunroof Wind Noise: Improperly sealed sunroof frames allow whistling wind noise and air leaks at highway speeds, harming comfort and fuel efficiency. We’ll adjust or replace worn seals and hardware until noise is eliminated.
  • Cooling System Failures: BMW straight-six engines are prone to early water pump and thermostat failures that can lead to overheating or even head gasket issues down the road. We advise 5 Series owners stay vigilant with cooling system service.

At M & R Auto, we truly understand BMWs inside and out. From routine maintenance to major mechanical repairs, our ASE-certified technicians have the factory-level expertise your modern BMW demands. Located in Menlo Park, we proudly serve discerning Bay Area BMW owners in Atherton.

Are you experiencing any of the common 5 Series problems described? We invite you to contact M & R Auto in Menlo Park today to schedule an appointment with our BMW specialists. We’ll thoroughly diagnose your vehicle’s issues, advise on repair options, and deliver reliable service with integrity. Call us now to learn more about caring for your ultimate driving machine.