BMW 3 GT-serie 35i Twinscroll (N55) 306 hp — Stage 1 file (+44 hp)
hp
Stage 1 file for BMW 3 GT-serie 35i Twinscroll (N55) 306 hp
Target +0 hp. Custom development for your engine.
Chip tuning for BMW 3 GT-serie 35i Twinscroll (N55) 306 hp ECU
BMW 3 GT-serie (2013 - F34) 35i Twinscroll (N55) 306 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 306 to 350 hp (+44 hp, +14%) and torque from 400 to 530 Nm (+130 Nm). This engine ships with different ECU variants: Bosch MEVD17.2, Bosch MEVD17.2.6, Bosch MEVD17.2.G, Bosch MEVD17.2.X. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. TCU units on this engine: ZF 6HP EGS, ZF 8HPxx — each is calibrated with a separate file (torque limiter, shift maps for Stage 1). In the CHIPOK database: 6 configurations · 6 ECU variants. A petrol engine built in 2013 — a Tricore platform without strong protection; OBD access works.
The BMW Group also includes Mini, Rolls-Royce and BMW Motorrad. The BMW petrol range spans the mainstream segment and the sporting M-series. 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.
On older and mid-generation BMWs, Stage 1 is flashed over OBD without Bench. 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. High-output engines deliver a solid gain with Stage 1 on stock hardware. 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.
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. Mini and FWD compacts use a different TCU platform with its own tooling base.
Frequently asked questions
How much horsepower does Stage 1 add for the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp?
Stage 1 chip tuning on the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp boosts engine output by 44 hp: from 306 to 350 hp. Torque rises from 400 to 530 Nm (+130 Nm).
What changes in the BMW 3 GT-serie ECU after Stage 1?
Stage 1 is a software optimization of the factory ECU firmware of the BMW 3 GT-serie with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed. The gain is +44 hp with no hardware changes.
Do you need hardware changes for Stage 1 on the BMW 3 GT-serie?
Stage 1 on the powerful BMW 3 GT-serie 35i Twinscroll (N55) 306 hp “lifts” the factory limiters with no hardware changes. The gain is noticeable in the mid and upper range. There is headroom left for moving to Stage 2 (downpipe + intake + intercooler).
What is Stage 2 for the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp?
Stage 2 for the BMW 3 GT-serie 35i Twinscroll (N55) 306 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.
Which control units is the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp built with?
The BMW 3 GT-serie 35i Twinscroll (N55) 306 hp comes with 4 ECU variants: Bosch MEVD17.2, Bosch MEVD17.2.6, Bosch MEVD17.2.G, Bosch MEVD17.2.X. Calibration is done for the specific unit after the revision is identified.
Can all the gearbox variants (ZF 6HP EGS, ZF 8HPxx) on the BMW 3 GT-serie be calibrated?
The BMW 3 GT-serie 35i Twinscroll (N55) 306 hp has 2 TCU variants: ZF 6HP EGS, ZF 8HPxx. Remapping the gearbox is essential after Stage 1 — the factory torque limiter is usually below what the engine can deliver.
Does the factory warranty of the BMW 3 GT-serie remain valid after Stage 1?
After remapping the BMW 3 GT-serie, the official factory warranty on the engine and gearbox is lost (this applies to any manufacturer when the ECU is modified). CHIPOK guarantees the quality of the calibration and free revisions.
How long is the wait for a Stage 1 remap for the BMW 3 GT-serie?
Reading and writing via OBD takes 25-30 minutes on the BMW 3 GT-serie. Bench reading (BDM/JTAG) takes about 60 minutes plus refitting. Remote file processing at CHIPOK takes 5-30 minutes.
How do you roll back to the factory firmware of the BMW 3 GT-serie?
Before Stage 1 the original of the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp is read out and saved — returning to the factory state is possible at any time.
How much does chip tuning the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp cost?
The remap price for the BMW 3 GT-serie 35i Twinscroll (N55) 306 hp is dynamic and is calculated in the CHIPOK calculator based on the selected options. A credit-based payment model, with no subscription fees.