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How are the BMW engine cylinders numbered?

BMW engine cylinders are numbered in a sequential order, starting from the front of the engine and moving towards the rear.

Here's a breakdown:

* Inline engines: Cylinders are numbered 1 through 6 (or more) consecutively, with cylinder 1 being at the front of the engine.

* V-engines: Cylinders are numbered 1-6 on one bank and 7-12 on the other bank, starting from the front of each bank and moving towards the rear.

* Horizontally opposed (boxer) engines: Cylinders are numbered 1-4 or 1-6, starting from the left side of the engine and moving towards the right.

Important Note:

* The specific numbering sequence may vary slightly depending on the model and engine configuration.

* It's always best to consult the service manual for the specific vehicle to confirm the correct cylinder numbering.

This information is useful for various tasks, such as:

* Identifying the location of a specific cylinder for maintenance or repairs

* Understanding the firing order of the engine

* Diagnosing engine problems and troubleshooting issues

Let me know if you have any other questions!