ChiptuneMAP/BMW/1-serie/18i - 129ch
BMW

18i - 129ch Tuning

BMW 1-serie: detailed power and torque gains by stage.

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Gains by stage(4)

Power

129 hp

Torque

180 Nm

Petrol
Power
129→145hp
+16 hp
+12%
Torque
180→200Nm
+20 Nm
+11%
OriginalTuned

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Tuners · ChiptuneFILE

Stage 1 file for the 18i - 129ch

Send the ECU read, get back an optimised and tested file.

  • Stage 1, Stage 2, E85
  • Checksum corrected, original file kept
  • For professionals only
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Everything about 18i - 129ch tuning

Tuning the 18i - 129ch found in the BMW 1-serie 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 1-serie 18i - 129ch, tuning delivers up to +31 hp and +40 Nm depending on the stage. Stock vs tuned figures:

StagePowerTorqueIndicative price
Stage 1129 → 145 hp180 → 200 NmOn quote
Stage 2129 → 160 hp180 → 220 NmOn quote
E85 Flexfuel129 → 129 hp180 → 180 NmOn quote
E85+129 → 145 hp180 → 200 NmOn quote

Frequently asked questions

What gains can I expect from tuning the 18i - 129ch?
Tuning the 18i - 129ch (BMW 1-serie) 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 - 129ch?
Yes, the 18i - 129ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a professional, experienced tuner with maps tailored to your engine.
How much does BMW 1-serie 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 1-serie?
Use the ChiptuneMAP directory to find a tuner near you. Compare prices, services and specialties.