Taotao OBD K+CAN Cable for BMW E‑Series — FT232RL USB Diagnostic Lead with Switch (K+D, D‑CAN, K‑CAN)

This cable provides a versatile, low-cost interface between a Windows PC and BMW vehicles that use K‑line and CAN bus protocols. It combines an FT232RL USB-to-serial chip with a manual switch to select K+D, D‑CAN or K‑CAN signaling, enabling communication with a wide range of models from older OBD BMWs to newer E‑chassis cars. The package includes the cable and a CD driver; confirm the store name is "Tao Tao" before purchase to ensure authenticity.

Which BMW models and years work with this cable?

The Taotao K+CAN cable supports many BMW E‑series, selected MINI and newer X/Z models spanning mid‑1990s through 2019 depending on protocol. Older cars use the BMW OBD interface and some later models require the D‑CAN/PT‑CAN or K‑CAN modes selected via the switch.

• Supported models include E46, E53, E60/E63/E64 (from 03/2007), E90/E91/E92/E93 (from 03/2007).
• Also compatible: E70/E71/E72 X5 series, E85/E86 Z4, E81/E82/E87/E88 1‑series (from 03/2007).
• Mini R50–R57 series (including R56) and some E65–E67 models are supported.
• Older BMW OBD protocol works for 1995–1998 (no K‑line) and 1998–03/2008 ranges.

How do I use the switch and what does it change?

The onboard slide switch toggles between K+D (K‑line plus D‑CAN) and all‑right (often for E46) positions so the cable can match a car's bus wiring. For many vehicles you’ll set the switch to one side for D‑CAN/PT‑CAN at 500 kbit/s or to the other for K‑CAN at 100 kbit/s; the manual setting avoids the need for extra adapters.

• For E46 models, move the switch fully to the right as instructed.
• Most other E‑chassis cars use the left switch position for combined K+D communication.
• Switch lets you diagnose the driver (DME) module without altering car wiring.
• Not every model requires changing the switch; consult model notes before use.

What functions and limitations should I expect?

This cable reads and clears fault codes, performs certain adaptations and applies coding changes where supported by the vehicle’s protocol. It is built specifically for the driver (DME) module and related coding tasks but does not replace specialized programming tools for some control units.

• Primary functions: read/delete errors, run adaptations, and apply coding where permitted.
• Does not support programming/replacing SMG transmission control units (e.g., E46 M3, E60 M5).
• Cannot program CAS, key fob modules, light control modules, or perform full commissioning of some replacements.
• Works with D‑CAN, PT‑CAN (500 kbit/s) and K‑CAN (100 kbit/s) protocols.

What software and computer setup does this cable require?

The cable uses an FT232RL USB interface and requires matching drivers and diagnostic software, typically on Windows systems. Disable antivirus software during installation if it mistakenly flags the driver; the cable is optimized for Windows 7 32‑bit and may work on some Windows 8/10 setups but is not compatible with macOS.

• Includes a CD with FTDI drivers; install on Windows before connecting the cable.
• Recommended environment: Windows 7 32‑bit; possible compatibility with Windows 8/10.
• Temporarily disable antivirus during installation if drivers are blocked.
• Not compatible with macOS and not guaranteed on 64‑bit systems.

Who is this for: Automotive technicians, independent BMW enthusiasts and DIY coders who need an affordable, switchable interface for diagnostic reading, basic coding and adaptation tasks on many E‑series and related BMW/MINI models. This cable is aimed at users who understand vehicle electronics and the limitations around module programming—if you require full control‑unit programming or dealer‑level flashing, choose a manufacturer‑level programmer instead.