Chiptuning Lexus RX IV (since 2015)
5 engines · +21 to +40 hp
Lexus RX IV: 5 engines — 5 petrol. The gain is +21 to +40 hp, with up to +60 Nm more torque. GAN GTL from 249 EUR, GAN GT from 399 EUR. GAN GA+ from 199 EUR.
All Lexus RX IV engines: exact gains
Standard output, output with GAN, the gain and the price for each box.
| Engine | STOCK → with GAN | Gain | Tuning boxes and prices | |
|---|---|---|---|---|
| Petrol · 5 engines | ||||
| 200T238 hp / 350 Nm | +40 hp+60 Nm |
GTL — 249 EUR · 271 hp GT — 399 EUR · 278 hp |
Select → | |
| 300T238 hp / 350 Nm | +40 hp+60 Nm |
GTL — 249 EUR · 271 hp GT — 399 EUR · 278 hp |
Select → | |
| 350h308 hp / 335 Nm | +25 hp+27 Nm |
GA — 219 EUR · 333 hp GA+ — 219 EUR · 333 hp |
Select → | |
| 350301 hp / 370 Nm | +24 hp+30 Nm |
GA — 219 EUR · 325 hp GA+ — 219 EUR · 325 hp |
Select → | |
| 450h263 hp / 335 Nm | +21 hp+27 Nm |
GA — 199 EUR · 284 hp GA+ — 199 EUR · 284 hp |
Select → | |
Each engine has its own tuning box: GAN GT / GTL or GAN GA / GA+. Prices are per box and include the current discount.
Not sure which engine you have?
Find your engine by the power output in your registration document: each version has its own module calibration.
Lexus RX IV remap: what changes
The GAN box plugs in between the sensors and the engine control unit (ECU) and adjusts their signals, while a flash remap rewrites the ECU itself. Your manufacturer’s warranty is preserved: the ECU software is never changed, and the box can be removed at any time.
- Bluetoothchange modes from your phone
- 18 mapsfine-tuning for your engine

- 15 minutesfitted to the factory connectors
- IP67water and dust protection
- +40 hpbest in this generation
200T 238 hp → 278 hp. The other engines gain at least +21 hp; check the table for each one.
- up to +12%with the GAN GA+ on naturally aspirated engines
For 3 naturally aspirated engines: GAN GA / GAN GA+ tuning boxes; check the table for each engine’s figure.
- GAN APPpower control via smartphone
SPORT, DYNAMIC, ECO and STOCK modes in the GAN app.
- 50 daystest drive
Feel the difference or get your money back, excluding delivery costs.
Lexus RX IV remap: common questions
Which tuning box do I need for the Lexus RX IV?
Turbocharged engines take the GAN GT or GAN GTL, naturally aspirated ones the GAN GA or GAN GA+. Find your engine in the table above – each row shows the box and its price.
Is a tuning module the same as a Stage 1 remap?
Not quite. Stage 1 usually means an ECU remap without replacing any parts. The tuning module also works without replacing parts, but it does not change the ECU software: it adjusts the sensor signals, comes off in about a minute, and the OFF button in the app restores the factory settings.