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Accelerator Pedal Sensor Replacement
 
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Pelican Technical Article:

Accelerator Pedal Sensor Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

****

Tools:

4mm Allen, flathead screwdriver

Applicable Models:

R52 MINI Cooper Convertible (2007-08)
R52 MINI Cooper S Convertible (2007-08)
R56 MINI Cooper Hatchback (2007-11)
R56 MINI Cooper S Hatchback (2007-11)
R57 MINI Cooper Convertible (2009-11)
R57 MINI Cooper S Convertible (2009-11)

Parts Required:

Accelerator pedal sensor

Hot Tip:

Clear fault codes when done

Performance Gain:

Remedy fault codes and restore engine performance

Complementary Modification:

Replace air filter

The digital motor electronics (DME) engine management system in MINI R56 vehicles is designed with a drive-by-wire throttle. There is no throttle cable connecting the accelerator pedal to the throttle housing. Instead, potentiometers in the accelerator pedal sensor communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. The signals from the sensor vary in voltage and differ in signal type. One signal is digital and one is analog.

Before you condemn your throttle housing or accelerator pedal sensor, be sure to inspect all the intake air ducts and hoses. They should be well-sealed and free from cracks or tears. Check the function of your crankcase breather valve and inspect all breather hoses. If a breather hose cracks or fails, the air leak can cause a rough idle or engine stalling. You may have to remove the throttle housing when servicing other components. If you do replace the throttle housing, be sure to replace the sealing gasket.

In this article, I'll go over the steps involved with replacing the accelerator pedal sensor on MINI R56 models.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The digital motor electronics (DME) engine management system in MINI R56 vehicles is designed with a drive-by-wire throttle.
Figure 1

The digital motor electronics (DME) engine management system in MINI R56 vehicles is designed with a drive-by-wire throttle. There is no throttle cable connecting the accelerator pedal to the throttle housing. Instead, potentiometers in the accelerator pedal sensor (red arrow) communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. The signals from the sensor vary in voltage and differ in signal type. One signal is digital and one is analog.

Working at the base of the pedal, pry out the small plastic plug (red arrows).
Figure 2

Working at the base of the pedal, pry out the small plastic plug (red arrows).

Then, remove the 4mm Allen fastener from the pedal assembly (red arrow).
Figure 3

Then, remove the 4mm Allen fastener from the pedal assembly (red arrow).

Push the pedal assembly up (red arrow) to detach it from the floor of the vehicle.
Figure 4

Push the pedal assembly up (red arrow) to detach it from the floor of the vehicle. When installing, be sure to align the slot in the pedal assembly (green arrow) with the tab (yellow arrow) on the body of the vehicle.

Working at the sensor, disconnect the electrical connector by pressing the release tabs (red arrows) and pulling it off.
Figure 5

Working at the sensor, disconnect the electrical connector by pressing the release tabs (red arrows) and pulling it off. Remove the sensor from the vehicle. After replacing the accelerator pedal sensor, allow the engine to idle for a couple of minutes before driving. This is to allow the system to adapt the new sensor to compensate for any differences between the components. If this is not carried out there will be a dead point in the sensor.

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Comments and Suggestions:
Serg Comments: Does this process apply to 04 mini coopers?
August 21, 2016
  Followup from the Pelican Staff: No.

Applicable Models:



R52 MINI Cooper Convertible (2007-08)
R52 MINI Cooper S Convertible (2007-08)
R56 MINI Cooper Hatchback (2007-11)
R56 MINI Cooper S Hatchback (2007-11)
R57 MINI Cooper Convertible (2009-11)
R57 MINI Cooper S Convertible (2009-11) - Nick at Pelican Parts
 
Carm Comments: I have a 2007 Mini Cooper non s R56 . I want to upgrade the pedals to JCW pedals. My question is will they work and does the gas pedal need to be programmed at the dealer . Mini dealer parts says it needs to be programmed or it will be in limp mode. Any info is greatly appreciated.
March 29, 2016
  Followup from the Pelican Staff: The pedal does have to be adapted. However, I have installed them and not had to. The vehicle ran normally. - Nick at Pelican Parts  

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