2010 BMW 750i Won't Start

Common Causes for Your 2010 BMW 750i Not Starting and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2010 BMW 750i won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions due to insufficient power supply.
  • Alternator: A failing alternator can result in insufficient electrical power to the vehicle, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the common problems that could cause a 2010 BMW 750i to not start?

When troubleshooting starting issues with a 2010 BMW 750i, it's essential to consider several common problems that could be at play. A dead battery is often the primary suspect, as it can prevent the engine from turning over due to insufficient charge. If the battery is functioning but the vehicle still won't start, the alternator may be malfunctioning, which is crucial for recharging the battery while the engine runs. Another potential issue is a failed starter motor, which is responsible for initiating the engine's operation; if it fails, the car simply won't start. Additionally, check for corrosion on the battery terminals, as this can impede electrical flow. Don't overlook the key fob battery either; a dead fob can disrupt the starting process. Beyond these specific issues, other factors such as ignition problems, fuel system malfunctions, and various electrical or mechanical failures could also contribute to starting difficulties. If these DIY checks do not resolve the issue, consulting a qualified mechanic is advisable for a thorough diagnosis and repair.

What are the initial diagnostic steps to take when a 2010 BMW 750i won't start?

When faced with a 2010 BMW 750i that won't start, it's essential to adopt a systematic diagnostic approach to identify the root cause. Begin by checking the battery, as a weak or dead battery is often the most common culprit. If the battery appears to be the issue, attempt a jump-start or recharge it to see if that resolves the problem. Next, inspect the alternator to ensure it is functioning properly, as it is responsible for charging the battery while the engine runs. If the battery and alternator are in good condition, turn your attention to the starter, which is crucial for initiating the engine. A malfunctioning starter can prevent the car from starting altogether. Additionally, examine the key or push start-stop button, as issues with these components can also hinder the starting process. Don't overlook the security system, as it may inadvertently prevent the vehicle from starting if it detects a potential threat. Finally, utilizing an OBD2 scanner can provide valuable insights into any underlying faults within the vehicle's systems, helping you pinpoint the issue more accurately. By following these steps in order, you can effectively diagnose and address the starting problem with your BMW 750i.

How urgent is it to diagnose and fix the starting issue in a 2010 BMW 750i that won't start?

When your 2010 BMW 750i refuses to start, it’s crucial to act swiftly. Ignoring this issue can lead to a cascade of problems, including potential damage to critical components like the fuel pump or starter. A weak fuel pump or faulty engine temperature sensor can exacerbate the situation, leading to more extensive repairs and higher costs. Moreover, a malfunctioning IBS sensor or other electrical issues can compromise the vehicle's safety and operability. Delaying diagnosis not only risks leaving you stranded but can also escalate the problem, making it more complex and expensive to fix. Therefore, it is essential to consult a certified BMW technician as soon as possible to accurately diagnose the issue and implement the necessary repairs, ensuring your vehicle remains safe and reliable on the road.

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