The BMW 20 PIN OBD adapter is a universal solution for diagnosing and connecting scanners to older BMW models with a round 20-pin diagnostic port. This adapter provides compatibility with modern diagnostic tools that use the standard 16-pin OBD2 connector. It enables full diagnostics of electronic systems, reading and resetting error codes, coding, and programming of control units.
Key Features and Benefits:
- Compatible with BMW Models: E36, E39, E53, Z3, and other vehicles equipped with the round 20-pin diagnostic port.
- Interface Conversion: 20 PIN (round) → 16 PIN (OBD2).
- Reliable Connection: High-quality contacts and a durable housing ensure stable signal transmission and long service life.
- Versatility: Works with most modern diagnostic scanners and software, including specialized BMW tools.
- Easy to Use: No additional power or configuration required. Simply connect the adapter between your car and the diagnostic tool.
- Product Code: OBDBM20.16
Technical Specifications:
- Type: Passive adapter.
- Connectors: BMW 20-pin round (female) → Standard OBD2 16-pin (male).
- Housing Material: Durable plastic.
- Contacts: Gold-plated for improved conductivity and corrosion resistance.
- Cable Length: None (direct plug-in adapter).
What is this adapter for? BMW vehicles produced roughly before 2001 (depending on the model) were often equipped with a unique round 20-pin diagnostic port. Modern diagnostic equipment is designed for the standard OBD2 (16-pin) connector. This adapter bridges that gap, providing access to diagnose older BMWs using modern tools.
Compatible Equipment: The adapter works with a wide range of diagnostic tools: from basic ELM327 scanners (Bluetooth/WiFi) for reading basic engine codes to professional devices like BMW K+DCAN, BMW ENET cables, and coding software such as BimmerCode, BimmerLink, INPA, NCS Expert, DIS, and others.
How to Use:
- Locate the round 20-pin diagnostic port in your BMW (usually in the engine bay).
- Connect the 20-pin side of the adapter to the car's port.
- Plug your diagnostic scanner or cable (e.g., K+DCAN) into the 16-pin OBD2 side of the adapter.
- Launch your diagnostic software on a laptop or smartphone.
- Begin diagnostics, reading fault codes, coding parameters, or programming modules.
Important Note: This is a passive adapter and only provides a physical connection. The diagnostic functionality depends entirely on the capabilities of your scanner and software.
The BMW 20 PIN OBD Adapter is an essential accessory for any owner, workshop, or enthusiast working with classic and older BMW models. It keeps your diagnostic equipment relevant and grants full access to your vehicle's electronic systems.