Toyota Tundra 4.0i V6 273 hp — Stage 1 file (+7 hp)

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Chip tuning for Toyota Tundra 4.0i V6 273 hp ECU

Toyota Tundra (1999) 4.0i V6 273 hp — mass-market petrol engine of the passenger segment of the Toyota Motor Corporation group (Япония, 1937). Stage 1 chip tuning raises power from 273 to 280 hp (+7 hp, +3%) and torque from 377 to 390 Nm (+13 Nm). In the CHIPOK database: 2 configurations. The 1999 generation — old-era petrol ECUs (ME7/ME9/MED9/Simos) with easily readable memory.

GR (Gazoo Racing) is Toyota's performance division (GR Yaris, GR Corolla, GR Supra, GR86). Toyota has historically focused on naturally aspirated, high-compression engines. Denso is Toyota's in-house ECU supplier (a locked platform). Toyota's petrol range spans naturally aspirated Dynamic Force engines and turbo units for the GR series.

The GR models (Yaris GR, Supra) have a growing tuning culture. Toyota has an active JDM tuning community (GR Supra, GR Yaris, GR86). The Denso ECU is a locked Toyota platform, and most models do not respond to standard chip tuning. High-output Toyota GR models sit in the performance segment with solid Stage 1 headroom.

Frequently asked questions

What power gain do you get after chip tuning the Toyota Tundra 4.0i V6 273 hp?

After Stage 1 the power of the Toyota Tundra 4.0i V6 273 hp rises from 273 to 280 hp, a gain of 7 hp (+3%). Torque rises from 377 to 390 Nm (+13 Nm).

How does Stage 1 differ from stock on the Toyota Tundra?

Stage 1 is a software optimization of the factory ECU firmware of the Toyota Tundra with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed. The gain is +7 hp with no hardware changes.

Do you need hardware changes for Stage 1 on the Toyota Tundra?

The high-output Toyota Tundra 4.0i V6 273 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.

What is Stage 2 for the Toyota Tundra 4.0i V6 273 hp?

Stage 2 on the Toyota Tundra 4.0i V6 273 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.

Does the factory warranty of the Toyota Tundra remain valid after Stage 1?

After remapping the Toyota Tundra, 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 Toyota Tundra?

Reading and writing via OBD takes 25-30 minutes on the Toyota Tundra. 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 Toyota Tundra?

Before Stage 1 the original of the Toyota Tundra 4.0i V6 273 hp is read out and saved — returning to the factory state is possible at any time.

How much does chip tuning the Toyota Tundra 4.0i V6 273 hp cost?

The remap price for the Toyota Tundra 4.0i V6 273 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: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno