2013 BMW 640i Engine Is Stalling

Common Causes of Engine Stalling in Your 2013 BMW 640i and How to Resolve Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a 2013 BMW 640i engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
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.

How much does it cost to fix a 2013 BMW 640i engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What diagnostic steps should be taken to address the stalling issue in a 2013 BMW 640i?

When addressing the stalling issue in your 2013 BMW 640i, it's essential to adopt a methodical diagnostic approach. Start by checking for any diagnostic trouble codes (DTCs) stored in the powertrain control module (PCM), as these codes can provide valuable insights into specific problems within the vehicle's systems. Next, inspect the wiring for any signs of damage or wear, since compromised wiring can lead to persistent stalling issues. It's also important to consider common causes of stalling, which may not always be linked to the Auto Start-Stop feature; other maintenance items or faulty components could be at play. For a more advanced diagnosis, using an oscilloscope can help you gather precise data to address the stalling problem effectively. Additionally, verify the air, fuel, and electrical systems to ensure they are functioning correctly, as any deficiencies in these areas can lead to power loss while the engine is running. Don't overlook the alternator, as a failing unit can often be a culprit in stalling scenarios. Lastly, confirm that the engine maintains the correct air/fuel ratio, sufficient idle speed, and a good spark to ensure smooth operation. By following these steps, you can systematically troubleshoot and resolve the stalling issue, enhancing the reliability of your BMW 640i.

What are the common problems that could cause the engine to stall in a 2013 BMW 640i?

When dealing with engine stalling in a 2013 BMW 640i, it's crucial to understand the common problems that may be at play. One of the primary culprits is the fuel system, where issues with the fuel pump or injectors can lead to symptoms such as rough idling, misfires, and a check engine light. Additionally, drivers may experience unexpected engine restarts when releasing the brake, which is a normal function but can be mistaken for stalling. Another significant factor is the timing belt or chain; if it skips, it can disrupt engine performance. Air supply is also vital; insufficient airflow can hinder engine function, leading to stalling. Furthermore, a failing high-pressure fuel pump (HPFP) can result in long cranking times and loss of power, while vacuum leaks in the fuel lines can exacerbate these issues. Addressing these problems promptly is essential for maintaining the performance and reliability of your BMW 640i, making it important for DIY enthusiasts to be aware of these potential pitfalls.

How urgent is it to address the engine stalling issue in a 2013 BMW 640i?

Addressing the engine stalling issue in a 2013 BMW 640i is of utmost urgency, as neglecting this symptom can lead to serious safety risks and costly repairs. Engine stalling often stems from inadequate fuel delivery, which can be caused by a clogged fuel filter, a failing fuel pump, or dirty fuel injectors. If these issues are not resolved promptly, they can escalate, resulting in a complete loss of power while driving, which poses a significant danger on the road. Additionally, stalling may indicate underlying problems with critical components such as the valvetronic system or timing chain, which, if left unchecked, could lead to severe engine damage. By addressing the stalling issue quickly, you not only enhance your vehicle's performance and reliability but also prevent more extensive and expensive repairs in the future. Therefore, if you experience engine stalling in your BMW 640i, it is crucial to take immediate action to ensure your safety and the longevity of your vehicle.

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2013 BMW 640i Engine Stalling: Causes & Repair Costs