BMW 4 Gran Coupé-series 40i 326 hp — Stage 1 file (+94 hp)
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Stage 1 file for BMW 4 Gran Coupé-series 40i 326 hp
Target +0 hp. Custom development for your engine.
Chip tuning for BMW 4 Gran Coupé-series 40i 326 hp ECU
BMW 4 Gran Coupé-series (2014 - F36) 40i 326 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 326 to 420 hp (+94 hp, +29%) and torque from 450 to 580 Nm (+130 Nm). This engine ships with different ECU variants: Bosch MG1CS003, Siemens/Continental MSD87. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. The ZF 8HPxx TCU is calibrated with a separate file — torque limiter and shift maps for Stage 1. In the CHIPOK database: 3 configurations · 3 ECU variants. The 2014 generation — mid-generation petrol ECUs (MEDC17/MEVD17/Simos PCR), OBD flash on production revisions.
M GmbH is BMW's performance division, building M engines since 1972. The factory calibration on BMW petrol engines is conservative, leaving headroom for Stage 1 without hardware changes. Mid-generation petrol models use standard OBD flash. Third-party flash platforms are an industry of their own for the BMW community.
The BMW community is renowned for active tuning and a large pool of available Stage files. Stage 1 on BMW usually stays within the standard timeframe, with no particular difficulty on the standard models. On older and mid-generation BMWs, Stage 1 is flashed over OBD without Bench. The BMW premium segment is a high-output platform with Stage 2 potential. The hardware headroom allows a confident move to Stage 1 without changing the turbo. High-output engines deliver a solid gain with Stage 1 on stock hardware.
The TCU rarely needs recalibration up to Stage 1+, as the torque limiter usually copes with the Nm gain. The gearbox comes in versions by torque class, so its tolerance depends on the engine. BMW's main gearbox is a modern multi-speed automatic.
Frequently asked questions
How much does the power of the BMW 4 Gran Coupé-series 40i 326 hp increase after Stage 1?
The Stage 1 gain for the BMW 4 Gran Coupé-series 40i 326 hp is 94 hp (+29%) over the stock 326 hp, for a total of 420 hp. Torque rises from 450 to 580 Nm (+130 Nm).
What is Stage 1 chip tuning for the BMW 4 Gran Coupé-series?
Stage 1 chip tuning of the BMW 4 Gran Coupé-series is a rework of the ECU maps: boost pressure, ignition advance, target lambda and the removal of factory torque limiters. The gain is +94 hp with no hardware changes.
Is Stage 1 safe on the high-output BMW 4 Gran Coupé-series 40i 326 hp?
The high-output BMW 4 Gran Coupé-series 40i 326 hp has a conservative factory calibration aimed at the mass market. Stage 1 unlocks the engine's real potential while turbo and injector life are preserved.
How much does Stage 2 add on the BMW 4 Gran Coupé-series?
Stage 2 on the BMW 4 Gran Coupé-series 40i 326 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.
Which ECUs are found on the BMW 4 Gran Coupé-series 40i 326 hp?
The BMW 4 Gran Coupé-series 40i 326 hp was fitted with different ECUs depending on the year and trim: Bosch MG1CS003, Siemens/Continental MSD87. The write method (OBD, Bench, Boot) is determined when the unit is read.
Is the ZF 8HPxx TCU calibrated together with Stage 1?
Yes, on the BMW 4 Gran Coupé-series 40i 326 hp the ZF 8HPxx TCU is calibrated with a separate file. The torque limit, shift maps, launch control rpm and clutch torque map are changed. The factory torque limiter in the TCU is usually below what the engine can deliver after Stage 1.
What happens to the BMW 4 Gran Coupé-series warranty after chip tuning?
The factory warranty of the BMW 4 Gran Coupé-series does not remain valid after Stage 1 — the manufacturer withdraws its obligations once the ECU software is changed. CHIPOK provides its own warranty on its work and support.
How long does remapping the BMW 4 Gran Coupé-series take?
On the BMW 4 Gran Coupé-series 40i 326 hp: OBD flash 25-30 minutes, Bench (if required) about an hour. The file processing itself takes 5-30 minutes once the original bin is received.
Is the original file kept when chip tuning the BMW 4 Gran Coupé-series?
Yes, the original ECU firmware of the BMW 4 Gran Coupé-series 40i 326 hp is kept and can be flashed back at any time. Returning to stock via OBD takes 25-30 minutes.
What is the price of a Stage 1 remap for the BMW 4 Gran Coupé-series?
Stage 1 for the BMW 4 Gran Coupé-series 40i 326 hp is paid for with CHIPOK credits (1 cr = 1 €). The final amount is set in the calculator, taking the extra options (off functions) into account.