Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSAPPLICATION AND ID
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Transmission Control Systems: Application and ID
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Application and ID
BMW Transmission ID Location:
Transmission Suppliers
BMW uses two automatic transmission suppliers.
^ Zahnradfabrik Friedrichshafen: (ZF) German supplier of BMW transmission. ZF manufactures both manual and automatic transmissions.
^ Hydramatic: Hydramatic is a manufacturing division of General Motors located in Strasbourg France. Hydramatic supplies smaller automatic transmissions used on M50 and M42 engines.
BMW Identification System
The BMW identification code system is the method used for parts ordering, information research and identification within the BMW technical organization.
BMW ID Code Breakdown:
BMW Identification Code Example
Manufacture ID Code Breakdown:
ZF Identification Code Example
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.