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BMW E23 most common problems

BMW E23 most common problems

Added on: January 22, 2024
Author: OctoClub

1. BMW E23 no spark issue

2. Electrical system

3. Exhaust problems in BMW E23

BMW E23 no spark issue

BMW E23 most common problems. A common problem with the BMW E23 that owners might face is the “no spark” issue. This problem usually stems from faults within the ignition system. Here are a few potential causes and solutions:

  • Faulty Ignition Coil: A malfunctioning ignition coil can lead to a lack of spark. Check the coil’s connections and replace it if necessary.
  • Distributor Issues: Problems with the distributor, such as a worn-out distributor cap or rotor, can also result in no spark. Inspect these components and replace them if needed.
  • Faulty Ignition Control Module (ICM): The ICM is crucial for controlling ignition timing. If it fails, it can lead to a lack of spark. Testing and replacing the ICM may be necessary.
  • Wiring and Connections: Examine the wiring and connections in the ignition system. Loose or damaged wires can disrupt the spark generation. Ensure all connections are secure and repair any damaged wiring.


Electrical system

  • Battery Issues: A weak or dead battery can cause various electrical problems. Ensure the battery is in good condition and properly charged. Clean the battery terminals and check for corrosion.

  • Alternator Problems: If the alternator fails, it can lead to a drained battery and various electrical issues. Test the alternator’s output and replace it if necessary.
  • Fuse and Relay Checks: Inspect the fuses and relays in the electrical system. A blown fuse or faulty relay can disrupt power flow to critical components. Replace any damaged fuses or relays.
  • Grounding Issues: Poor grounding can lead to erratic electrical behavior. Check the ground connections for cleanliness and tightness.

Exhaust problems in BMW E23


  • Exhaust Leaks: Leaks in the exhaust system can affect performance and emissions. Inspect the exhaust system for any visible leaks and repair them promptly.
  • Catalytic Converter Issues: A failing catalytic converter can cause poor engine performance and emissions problems. Check for any signs of a clogged or malfunctioning catalytic converter and replace if necessary.
  • Rust and Corrosion: The exhaust system is susceptible to rust and corrosion, especially in regions with harsh weather conditions. Regularly inspect the exhaust components for rust and replace any severely corroded parts.
  • Exhaust Hanger Damage: Damaged or broken exhaust hangers can result in an unstable exhaust system. Check the hangers and replace any that are damaged.

Remember, specific diagnostic steps may vary depending on the model year and engine of your BMW E23. If you’re not comfortable troubleshooting these issues yourself, it’s advisable to consult with a professional mechanic or BMW specialist for a thorough diagnosis and repair.



Are you already a proud owner of a BMW E23? If so, check out our selection of parts for this car at the following link:


Photos sources:, BMW BLOG,

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