Sprint Booster Pedal Box Throttle Controller for BMW & MINI (2002+) - Plug & Play Accelerator Pedal Tuner/Throttle Booster, Lag Eliminator, Drive-by-Wire Sensitivity Adjuster - Fits E/F/G Series 1-8, X & M Models - RSBD401/RSBD402

Instant Accelerator Response Upgrade for BMW and MINI

Give your BMW or MINI the sharp, immediate pedal feel it deserves. This compact plug-in accelerator module from Sprint Booster transforms the electronic accelerator signal for crisp take-off, punchier mid-range and confident overtaking, all without remapping or permanent modification. TÜV tested and road-proven, it is the simplest way to remove hesitation and make every press of the pedal feel alive.

We have fitted and used this unit extensively at MJ Modifications in Warwickshire and the feedback is consistently brilliant. Owners report a night-and-day improvement in drivability with no downside, no warning lights and no impact on factory safety systems.

What you will feel

• Immediate accelerator response with reduced delay from standstill and between gears
• Stronger pick-up at low and mid rpm for safer overtaking and easier merging
• Smoother downshifts and more precise modulation in both auto and manual gearboxes
• No ECU map changes, no cutting or splicing, no coding
• Does not interfere with ABS, traction control, fuel injection or other vehicle systems

How it works

Modern BMW and MINI models use an electronic accelerator. The Sprint Booster module sits between the OEM pedal connector and the vehicle harness, optimising the pedal signal sent to the ECU. The result is a more eager response to pedal input without altering engine calibration. Installation is fully reversible and takes minutes.

Three modes with 18 levels of fine-tuning

• OFF: factory behaviour restored
• SPORT: up to 30 percent increased sensitivity with 9 incremental settings
• RACE: up to 60 percent increased sensitivity with 9 incremental settings

Set it exactly how you like it. The compact controller mounts neatly on the dash with the supplied adhesive, stores your last setting in memory and can be removed while the module retains your preference.

Extra security and control

• Pedal Lock: disables throttle at idle using a user-defined 3-digit PIN
• Valet Mode: limits pedal input by 55, 65 or 75 percent via PIN for peace of mind

Certified quality

TÜV tested and certified. European Conformity type approval mark No e24031712. Protected by international patents including US 8,706,373 and EP1957310.

Quick DIY install or pro fitting

Unplug the accelerator pedal connector, insert the module inline, mount the selector and you are done. No tools beyond basic trim care. Prefer professional installation or want it set up perfectly for your driving style? MJ Modifications offers fitting at our Warwickshire workshop. Email info@mjmodifications.co.uk for a quote.

Compatibility and part numbers

RSBD401 — BMW cars 2002 onwards excluding X Series

• BMW 1 Series, 2 Series, 3 Series, 4 Series, 5 Series, 6 Series, 7 Series, 8 Series and M models
• MINI Cooper 2002+, MINI One 2002+, MINI Countryman 2010+
• Also compatible: Hyundai Equus 2010–2015, Hyundai Genesis BK Coupe 2009+, Hyundai Genesis BH Sedan 2009–2013, Hyundai Genesis DH Sedan 2014+, Kia K900 2015+, Kia Quoris 2012+, Land Rover Range Rover L322 2002–2012

RSBD402 — BMW X Series 2002 onwards

• BMW X1, X3, X4, X5, X6

Why buy from MJ Modifications

• We use what we sell and can recommend real-world settings for daily driving or spirited road use
• Excellent customer satisfaction with noticeable gains in responsiveness and control
• Professional installation and friendly advice available in Warwickshire

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Part numbers: RSBD401 and RSBD402. Manufactured by Sprint Booster.