BMW Z4 M40i 374 hp — Stage 1 file (+46 hp)
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Stage 1 file for BMW Z4 M40i 374 hp
Target +0 hp. Custom development for your engine.
Chip tuning for BMW Z4 M40i 374 hp ECU
BMW Z4 (2019 - G29) M40i 374 hp — premium petrol engine of the passenger segment of the BMW Group (Mini, Rolls-Royce, BMW Motorrad) group (Германия, 1916). Stage 1 chip tuning raises power from 374 to 420 hp (+46 hp, +12%) and torque from 500 to 580 Nm (+80 Nm). This engine ships with different ECU variants: Bosch MG1CS003, Bosch MG1CS201. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. TCU units on this engine: ZF 8HPxx, ZF 8HPxx-Gen3 — each is calibrated with a separate file (torque limiter, shift maps for Stage 1). In the CHIPOK database: 4 configurations · 4 ECU variants. A 2019 petrol engine — the latest era of encrypted firmware; OBD access is available on production units, Bench on sport models.
The BMW Group also includes Mini, Rolls-Royce and BMW Motorrad. M GmbH is BMW's performance division, building high-output top engines since 1972.
Stage 1 on BMW usually stays within the standard timeframe, with no particular difficulty on the standard models. The BMW community is renowned for active tuning and a large pool of available Stage files. Top BMW engines confidently reach Stage 2 with a downpipe + intake + intercooler. Bench reading is the standard procedure for top engines in modern models. Top BMW engines sit at the power ceiling, and the gain is significant. A well-known base once hardware is added (downpipe + intake + intercooler).
BMW's main gearbox is a modern multi-speed automatic. The TCU rarely needs recalibration up to Stage 1+, as the torque limiter usually copes with the Nm gain. Top BMW models use a reinforced gearbox version that handles significant stock torque.
Frequently asked questions
How much horsepower does Stage 1 add for the BMW Z4 M40i 374 hp?
Stage 1 chip tuning on the BMW Z4 M40i 374 hp boosts engine output by 46 hp: from 374 to 420 hp. Torque rises from 500 to 580 Nm (+80 Nm).
What changes in the BMW Z4 ECU after Stage 1?
Stage 1 on the BMW Z4 M40i 374 hp is a software ECU calibration with no hardware changes. The key maps (boost/ignition/lambda/torque) are adjusted while factory tolerances are preserved. The gain is +46 hp with no hardware changes.
What does Stage 1 give on the top-spec BMW Z4 M40i 374 hp?
On the top-spec BMW Z4 M40i 374 hp engine, Stage 1 is the starting point before Stage 2 with a downpipe, intake and a larger intercooler. The mass-market factory calibration leaves substantial headroom for an aggressive software tune.
How does Stage 2 differ from Stage 1 on the BMW Z4 M40i 374 hp?
Stage 2 for the BMW Z4 M40i 374 hp is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.
How many ECU variants does the BMW Z4 M40i 374 hp have?
The BMW Z4 M40i 374 hp has 2 ECU variants: Bosch MG1CS003, Bosch MG1CS201. Before flashing you need to read the specific unit — calibration is done for the exact hardware/software.
Which TCUs are found on the BMW Z4 M40i 374 hp?
The BMW Z4 M40i 374 hp was fitted with different automatic-transmission units: ZF 8HPxx, ZF 8HPxx-Gen3. All are supported via Bench reading; the Stage 1 calibration is done for the specific TCU after the revision is identified.
Does Stage 1 void the warranty on the BMW Z4?
Stage 1 on the BMW Z4 voids the factory warranty on the engine and transmission — this is standard for all manufacturers. CHIPOK provides its own warranty on the quality of the remap.
How quickly is chip tuning of the BMW Z4 M40i 374 hp done?
The full remap cycle for the BMW Z4 — from reading to writing the final file — takes 30-90 minutes depending on the ECU access method. The file is prepared at CHIPOK in 5-30 minutes.
Can you return to stock after Stage 1 on the BMW Z4?
The original BMW Z4 ECU is always saved before flashing. Rolling back to the factory firmware is done with the same programmer in 25-30 minutes.
How much does Stage 1 cost for the BMW Z4 M40i 374 hp?
The cost of Stage 1 for the BMW Z4 M40i 374 hp is calculated in the calculator on this page — you select the options (DPF off, EGR off, AdBlue off, DTC off, etc.) and the price is capped by the package Max Price. Payment is by credits (1 cr = 1 €), with no subscriptions.