BMW 5 Series standalone ECUs
BMW's rear-wheel-drive executive sedan; the E34 and E39 models in the data use M50- and M54-family straight-six engines.
- Chassis
- E34 · E39
- Years
- 1990–2004
- Engines
- M54 2.0-3.0 · M50 non-VANOS (DME 3.1) · M50TU single VANOS (DME 3.3.1)
- Layout
- 6-cylinder, RWD
You have 6 plug-in ECU options for the BMW 5 Series from MaxxECU and ECUMaster. The cheapest complete setup is ECUMaster at US$1,298 including the ECU. 55 wire-in ECUs can also run its 6-cylinder engine with a custom loom, from US$275.
Prices checked and include the ECU.
Your options for this car
New to this? Three ways to fit an aftermarket ECU explains each one in five minutes.
Dedicated plug-in 0
Built for this car. Goes where the factory ECU was and plugs straight into the factory loom.
None listed for this car.
Standalone + adapter harness 6
A general-purpose ECU with an off-the-shelf harness that joins it to the factory ECU plug.
From US$1,298 →
Wire-in ECU 55
Any ECU with the right features, on a new or rewired loom. Best for race cars, swaps and big changes from factory.
From US$275 plus loom →
Reflash
Keep the factory ECU and rewrite its tune. Usually the cheapest, keeps every factory feature, but limited to what the factory hardware can control.
Reflash options for this car are still being checked.
Plug-in ECUs for the BMW 5 Series
6 options, cheapest first. Each one links to its full specs and sellers.
BMW M50 NON-VANOS PNP for EMU Black
BMW M50 WITH VANOS PNP for EMU Black
BMW M54 (MS42/43) RACE PLUGIN EXTRA
Complete kit: MaxxECU unit + plug-in adapter + LSU 4.2 wideband + accessories (EXTRA); not in stock
No plug-in is listed for that chassis and year. A wire-in ECU below will still fit with a custom loom.
Wire-in ECUs that can run this engine
Cheapest current unit from each brand with at least 6 injector and ignition outputs, so it runs fully sequential.
Add a loom: built by your tuner or a loom maker. Filter every wire-in ECU by features and price
Find a tuner for these ECUs
Shops with their own dyno that tune the brands above.
About the makers: MaxxECU · ECUMaster