Gains by stage(4)
Power
156 hp
Torque
240 Nm
essence
Power
156→260ch
+104 ch
+67%
Torque
240→360Nm
+120 Nm
+50%
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Everything about 18i - 156ch tuning
Tuning the 18i - 156ch found in the BMW Z4 is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the BMW Z4 18i - 156ch, tuning delivers up to +134 hp and +160 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 156 → 260 hp | 240 → 360 Nm | — |
| Stage 2 | 156 → 290 hp | 240 → 400 Nm | — |
| E85 Flexfuel | 156 → 156 hp | 240 → 240 Nm | — |
| E85+ | 156 → 260 hp | 240 → 360 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 18i - 156ch?
Tuning the 18i - 156ch (BMW Z4) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 18i - 156ch?
Yes, the 18i - 156ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does BMW Z4 tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my BMW Z4?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.