BMW Series 4 M440d Stage 1: 340→385hp | DMS Tuned

BMW Series 4 M440d Stage 1: 340→385hp

BMW Series 4 M440d Stage 1: 340hp → 385hp, 700→752Nm. Custom DMS calibration written for your car — not an off-the-shelf file. From €450. Athens + remote.…

BMW Series 4 Stage 1: 340 hp → 385 hp

Factory output for the BMW Series 4 M440d is 340 hp and 700 Nm. A Stage 1 remap targets 385 hp and 752 Nm — 45 hp (+13%) and 52 Nm (+7%).

Those are the figures we work to on this engine. They are a starting point, not a promise: the number we hand back is the one your car makes on our dyno, measured before and after on the same day, in the same conditions.

Where the 52 Nm shows up

On a diesel the useful change is torque, not peak power. Going from 700 Nm to 752 Nm fills in the mid-range, which is where a BMW Series 4 actually spends its time — pulling from 1,800 to 3,000 rpm in a high gear, overtaking without dropping two gears, towing or carrying weight without the engine falling on its face.

Peak power moves too, 340 hp to 385 hp, but you will feel the 52 Nm far more often than the 45 hp.

What Stage 1 involves on a BMW Series 4

We read the ECU, log the car as it stands, and put it on the dyno to confirm the 340 hp baseline — a tired or faulty engine gets diagnosed before it gets mapped, not after.

The calibration is written for your car, not pulled from a file library. We adjust fuelling, ignition timing, injection timing and boost, then re-run the dyno to verify the 385 hp and 752 Nm figure and check knock, lambda and temperatures under load.

Turnaround is same-day for most cars. Stock file is archived, so the car can go back to standard whenever you want.

Which BMW Series 4 this covers

These figures are for the M440d as fitted 2020–2024. Engine code and ECU type decide what is possible, so send us the registration or VIN and we will confirm the exact variant before you book anything.

BMW Series 4 remap price and booking

Stage 1 for the BMW Series 4 M440d starts at €450, including the dyno runs before and after and the stock-file archive.

We work from Leoforos Karamanli 127, Artemida 19016, east of Athens, and tune remotely across Europe where the ECU allows it. WhatsApp +30 697 728 8810 with your registration for a straight answer on your car.

Other BMW Series 4 engines

More BMW tuning

More from DMS Tuned

WhatsApp +30 697 728 8810 · Επικοινωνία · Τιμές · Δυναμόμετρο · ECU Tuning