MS43 Turbo Tune for M54 in e46/e39/e53


MS43 turbo tuning package for M54 from double vanos Z3 models to e46 325i, 330i, and double vanos 525i e39 and 530i e39. Works on other turbo cars with MS43.

please include known specs of your turbo

ie: turbo manifold, intercooler, wastegat, bov, size of the exhaust, size of charge pipes, boost control method, wideband, breather configurations, anything else notable…

cams, intake, changed compression ratio, anything out of the ordinary, add here

SKU: ms43turbotune Category: Tags: , , , , ,


MS43 turbo tune for M54 from e36 z3, e46, e39, or e53

This is our forced induction turbo tuning package for m54 and other m5x engines running MS43 siemens electronics. This bespoke product is compatible natively with the following vehicles:

e46 325i and 325ci, 330i and 330ci (01-03 rwd models, 01-06 xi models)

e39 525i and 530i 2001-2003

e53 x5 3.0i 99-06

z3 01-02 2.5i, 3.0i

This turbo tune is also compatible with any swap using ms43 and a m5x. 

Tuning solution for any M5x operating with ms43

Put a m52 in your Nissan and using ms43 to make it run? Cool! We can help! This is our turbo tuning package for whatever build you can dream up on ms43 ecu/dme.

This item is the tuning only.

We Be Racing

At its very core, remote tuning is a collaborative effort between the tuner and the driver. We are always honored to be your choice for this role, and will apply all of our experience to help your build achieve its peak form. Developing safe, reliable and high-performing tunes is our reason for existing as a business. 

What is included?

This tuning package includes 1 completed revision, which includes up to 10 edits. We begin with a base map as a starting point and work our way through these edits to achieve a polished state. The tune is built around and fine-tuned to one set of hardware and one fuel, subsequent hardware changes may require editing to ensure good function.

This item is the calibration product only.

For more information on remote tuning and our process

Flashing directions

While remote tuning is the standard of this product, in-person tuning is available in the northern Virginia area. 

Supported Hardware:
Supported MAFs:

stock, m54b30 retrofit, Bosch 0 280 218 067 (Audi rs4), HPX, HPX-e, Nissan slot maf in a 72mm ID housing

The standard HPX fitted in an mh-30 housing (as pictured in this listing) is our recommended mass air flow sensor. And though other options do work, we find the HPX to be the most elegant and effective method of metering air for these electronics. While stock MAF is technically supported by this custom product, we can tune for it, but it has very low limits and a build utilizing the stock MAF must fit into the capabilities of its reading capacity. Power goals must match the limits of the meter. For reference, the m54b30 MAF can support up to 340whp.

Top mount? bottom mount? midmount? T3 or t4 or vband? it doesn’t matter, it’s all cool, we don’t discriminate. T2!? Well, that’s a little small, but whatever, let’s do it!

Supported injectors:

please email us to confirm injector support if there’s any doubt


Note: This product is for cars running the MS43 ecu/dme.

For cars running MS41 dme/ecus, click here.

For cars running MS42 dme/ecus, click here.

This product is for off-road use only
This is a digital product!