Smart ForFour 0.9 TCE 90 hp — Stage 1 file (+15 hp)

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Chip tuning for Smart ForFour 0.9 TCE 90 hp ECU

Smart ForFour (2014) 0.9 TCE 90 hp — mass-market petrol engine of the passenger segment of the Mercedes-Benz Group AG / Geely (с 2020 — JV) group (Германия, 1926). Stage 1 chip tuning raises power from 90 to 105 hp (+15 hp, +17%) and torque from 135 to 165 Nm (+30 Nm). This engine ships with different ECU variants: Siemens/Continental EMS3125, Siemens/Continental EMS3140, Siemens/Continental EMS3150, Valeo V50.1. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. In the CHIPOK database: 4 configurations · 4 ECU variants. A petrol engine built in 2014 — a Tricore platform without strong protection; OBD access works.

Smart specialises in micro urban cars (ForTwo, ForFour). The Smart #1 and #3 are the new generation of electric crossovers built on the Geely platform. Smart is a German compact-car brand within the Mercedes-Benz Group, and since 2020 a joint venture with Geely. AMG is Mercedes's performance division (since 1967), acquired by Mercedes in 1999. Low-output Mercedes petrol engines are naturally aspirated, so the gain is modest but safe. Maybach uses Mercedes engines for the ultra-luxury segment, with the emphasis on quietness and smoothness.

The AMG community is active in Germany, but the protection is the toughest in the industry, so Stage 1 on AMG usually requires Bench. Stage 1 on Mercedes often requires refreshing the adaptations after the flash. Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. On low-output Mercedes engines, Stage 1 is safe and does not over-stress the hardware. On naturally aspirated Mercedes engines without a turbo, the main effect is on throttle response. In the Mercedes city segment, Stage 1 is more about comfort and responsiveness than power.

Frequently asked questions

What power gain do you get after chip tuning the Smart ForFour 0.9 TCE 90 hp?

Stage 1 for the Smart ForFour 0.9 TCE 90 hp adds +15 hp — power increases from 90 to 105 hp (+17%). Torque rises from 135 to 165 Nm (+30 Nm).

What does a Stage 1 remap of the Smart ForFour 0.9 TCE 90 hp include?

Stage 1 is a software optimization of the factory ECU firmware of the Smart ForFour with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed. The gain is +15 hp with no hardware changes.

Is Stage 1 worth doing on the base Smart ForFour?

Yes, Stage 1 on the low-output Smart ForFour 0.9 TCE 90 hp delivers a moderate but genuine gain — without overstressing the hardware. On base naturally aspirated engines the effect is felt mainly as improved throttle response and a stronger mid-range.

What is Stage 2 for the Smart ForFour 0.9 TCE 90 hp?

Stage 2 for the Smart ForFour 0.9 TCE 90 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 Smart ForFour 0.9 TCE 90 hp built with?

The Smart ForFour 0.9 TCE 90 hp comes with 4 ECU variants: Siemens/Continental EMS3125, Siemens/Continental EMS3140, Siemens/Continental EMS3150, Valeo V50.1. Calibration is done for the specific unit after the revision is identified.

Does the factory warranty of the Smart ForFour remain valid after Stage 1?

After remapping the Smart ForFour, 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 Smart ForFour?

Reading and writing via OBD takes 25-30 minutes on the Smart ForFour. 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 Smart ForFour?

Before Stage 1 the original of the Smart ForFour 0.9 TCE 90 hp is read out and saved — returning to the factory state is possible at any time.

How much does chip tuning the Smart ForFour 0.9 TCE 90 hp cost?

The remap price for the Smart ForFour 0.9 TCE 90 hp is dynamic and is calculated in the CHIPOK calculator based on the selected options. A credit-based payment model, with no subscription fees.

Last updated: 30.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno