Description
BMW M50 Standalone ECU (VANOS & Non-VANOS)
Upgrade your BMW M50 engine with a true BMW M50 Standalone ECU, designed specifically for BMW M50 and M50 VANOS engines found in the E36 chassis.
Unlike generic engine management systems, the RM-Primis BMW M50 Standalone ECU delivers factory-level integration while unlocking full motorsport-grade control.
As a result, you get modern engine management without cutting, splicing, or rewiring your original BMW harness.
✅ Plug-and-Play ECU for BMW M50 Engines
This BMW M50 Plug-and-Play ECU is based on the RM-Primis universal standalone ECU combined with a dedicated BMW Bosch 88-pin harness adapter.
Therefore, installation is fast, clean, and fully reversible.
Supported engines:
BMW M50 non-VANOS
BMW M50 VANOS
E36 320i / 325i
E34 520i / 525i
E39 520i / 525i (early)
Z3 2.0 / 2.2 / 2.5
Each unit is pre-configured before shipping, so you receive a ready-to-install solution.
✅ What’s Included with the BMW M50 Standalone ECU
RM-Primis Standalone ECU
BMW Bosch 88-pin harness adapter
ECU adapter cable
USB tuning cable
Pre-configured jumpers for M50 / M50 VANOS
Full access to RM-Tuner software
In other words, everything you need to get your BMW running on standalone management.
✅ Advanced Engine Control for BMW M50 & VANOS
Unlike piggyback systems, this BMW M50 Standalone ECU gives you complete control over every engine function.
Engine Management Features
Full sequential fuel and ignition
VANOS control (open & closed loop)
Built-in 400 kPa MAP sensor
Wideband O₂ support (Bosch LSU 4.9 / 4.2)
Advanced idle control (1-wire & 3-wire valves)
Electronic throttle support (optional DBW upgrade)
As a result, drivability improves dramatically, even on aggressive builds.
✅ Motorsport Features for Turbo & NA Builds
Whether you’re building a street car or a track weapon, the RM-Primis ECU delivers.
Launch control
Flat-shift / torque reduction
Motorsport-grade anti-lag
Boost-by-gear
Dual open & closed loop boost control
PWM fan control
Additionally, boost, fuel, ignition, and VANOS maps are fully tunable.
✅ CAN-Bus & Transmission Support
The BMW M50 Standalone ECU includes full CAN-bus capability, allowing integration with:
OEM BMW modules
Dash displays
Data loggers
ZF 8HP automatic transmissions (optional upgrade)
👉 Learn more about ZF 8HP control here:
https://help.primis-ecu.com
✅ Inputs, Outputs & Technical Specifications
Ignition outputs: 6
Injector outputs: 6
Low-side outputs: 6
High-side outputs: 4
Analog inputs: 8
Knock inputs: 2
VR / Hall crank & cam support
Dedicated IAT / CLT / TPS inputs
Fully configurable I/O logic
Because of this flexibility, the ECU easily adapts to future upgrades.
✅ Built-In Engine Protection Strategies
To protect your BMW M50 engine, the RM-Primis ECU includes:
Configurable rev limiter
Lean protection
Boost cut safety
Advanced knock control (per-cylinder)
Overrun fuel cut
Custom analog sensor alarms
In short, performance and reliability go hand in hand.
✅ Why Choose the RM-Primis BMW M50 Standalone ECU?
Designed specifically for BMW M50 & M50 VANOS
True plug-and-play installation
No subscriptions or locked features
Free RM-Tuner software
Constant firmware & software updates
Direct support from experienced engineers
Most importantly, this ECU grows with your build.
