Question about 2003 Mini Cooper

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2003 Mini cooper S steering is "twitching left and right. It isn't noticable at low speeds, but as you increased speed, it would cause the vehicle to jump left or right, as if you were intentionally swerving a pothole. Mini dealer service wants to replace the entire Power Steering Pump for $1,200. Any other ideas??? thanks. Alan M

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A rack and pinion system has no idler or pitman arms and no center link. Instead, they are replaced with a rack. Because the rack has no wear points, the number of wear points on rack and pinion systems is reduced to four--each of the tie-rod ends. Tie-rod ends are also wear points on the parallelogram steering system.

Power rack and pinion assemblies should be carefully checked for leaks before the actually Power steering pump is replaced. If leaks cause the pump to run out of fluid, the pump will be damaged. In order to solve problems, a very thorough inspection of the entire system is needed. Everything, including ball joints, tires, outer tie-rods, bellows boots, inner tie-rods, rack-mounting bushings, mounting bolts, steering couplings, and gearbox adjustment must be checked as well.

Rack and pinion steering inspection must be very thorough because of the system's sensitivity. I would advise the service techs to inspect all areas above before replacing the power steering pump. if the areas above show no trauma points and, there are no serious or, visible leaks concerning the assembly, the replacement of the pump is recommended.

Posted on Jul 16, 2009

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My 2006 Buick Lacrosse suddenly started pulling to the right and became very hard to steer. Then the "Charging System Failure" warning came on. What could this be?


Do you know if your vehicle has --------------------------------------------------------------------------------
Power Steering System (w/o Electro-Hydraulic Steering) or
Variable Effort Steering System
The variable effort steering (VES) system or MAGNASTEER® varies the amount of effort required to steer the vehicle as vehicle speed changes. At low speeds, the system provides minimal steering effort for easy turning and parking maneuvers. Steering effort is increased at higher speeds to provide firmer steering for increased road feel and directional stability. The electronic brake control module (EBCM) controls a bi-directional magnetic rotary actuator located in the steering rack and pinion. The EBCM varies the steering assist by adjusting the current flow through the actuator to achieve a given level of effort to steer the vehicle. The VES system accomplishes this by adding or subtracting torque on the input shaft to the rack and pinion. The main component of the system is an electromagnetic actuator, which consists of a multiple-pole ring-style permanent magnet, a pole piece, and an electromagnetic coil assembly. The VES system uses the ABS wheel speed sensor inputs to determine vehicle speed. When the EBCM senses wheel speed, it commands a current to the VES actuator that is most appropriate for each speed. The EBCM commands current from negative two amps to positive three amps to the actuator, which is polarized. At low speeds, a negative current is commanded, which assists steering. At medium speeds no current is commanded and steering is assisted by hydraulics only. At high speeds, a positive current is commanded, which creates steering resistance. Ignition voltage and ground are provided through the EBCM. The EBCM has the ability to detect malfunctions in the actuator or the circuits to the actuator. Any malfunctions detected will cause the system to ramp to zero amps and steering will be assisted by hydraulics only and set a DTC.
Are there any other lights lit on the dash ? ABS ?
DTC C0450 Steering Assist Control Solenoid/Motor/Actuator Circuit could have a diagnostic trouble code !
The electronic brake control module (EBCM) commands current from 0-1 amp to the variable effort steering (VES) actuator, depending on vehicle speed. At low speeds, 1 amp of current is commanded to the actuator and the actuator valve is fully closed. A speed increases, less current is commanded to the actuator and the valve opens, allowing pressure to bleed off through a power steering fluid orifice. The EBCM monitors and compares the Commanded and Feedback Current parameters to detect malfunctions in the VES system.
Or you could have a bad steering rack !
Charging System/Generator Fault
Refer to Charging System Description and Operation in Engine Electrical
Alternator problem maybe !
The electrical power management (EPM) system is designed to monitor and control the charging system and send diagnostic messages to alert the driver of possible problems with the battery and generator. This EPM system primarily utilizes existing on-board computer capability to maximize the effectiveness of the generator, to manage the load, improve battery state-of-charge (SOC) and life, and minimize the system's impact on fuel economy. The EPM system performs 3 basic functions:
• It monitors the battery voltage and estimates the battery condition.
• It takes corrective actions by adjusting the regulated voltage.
• It performs diagnostics and driver notification.

Nov 27, 2016 | Buick Cars & Trucks

1 Answer

Where do I put the power steering fluid on a 2003 mini cooper?


No fluids are consumed on any vehicle

So why would you be adding, unless you have
a leak to repair

Have a repair shop educate you

Mar 28, 2013 | 2003 Mini Cooper

1 Answer

I get a grinding noise and slight vibrations that I can feel under my feet. This usually happens at low speeds, but has become more noticeable now at c. 30 mph.


You need wheel bearings.. One for sure maybe 2. Do you feel it in the steering wheel or floor? The floor usually means rear and the steering wheel usually means front. Hope this helps. It should change pitch when you drive left to right at a steady speed. :-) Cobra

Jun 04, 2010 | 2003 Ford Escape

1 Answer

Tight steering


It may be reacting to a vehicle stability control system, visit honestautoestimates.com for free complete information about any repair including how much it should cost.

Mar 01, 2010 | 2002 Mazda Tribute

1 Answer

Tight steering


wrong it can be .... the pump has an impeller in it
at low speeds it might be working fine.. but at higher speeds the impeller is slipping so it is not moving the oil like it should... replace the pump...

Mar 01, 2010 | 2009 Honda CR-V

1 Answer

Noise coming from the front end of my 2003 dodge durango


You didn't specify if your vehicle is 2- or 4-wheel drive. If 4 wheel, you may have a failing contstant velocity joint which, when having developed worn spots in the cage can cause the noise you describe.
Typically, turning the wheel back and forth can cause the noise to become less or more loud and often the combination of a specific speed and driving a certain curve radius can cause the noise to nearly disappear or become more pronounced.

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1 Answer

Steering jumps left or right while driving. WHeels and tires are ok. I hear there are problems with the steering pump wiring.


You need to have your speed sensitive steering sensor checked out. What is happening is that a relay adjusts your steering based on the spped you are going. I have has the same problem, and it wasn't noticable at low speeds, but as you increased speed, it would cause the vehicle to jump left or right, as if you were intentionally swerving a pothole. Have a good mechanic look at it and it shouldn't be to costly. Good Luck.22

Jun 24, 2009 | 2003 Mini Cooper

1 Answer

VW touareg steering judder low speed left/right turn


Sounds like you have air in your steering system. I would start by looking for any leaks on your steering system like hose to fitting crimps, steering pump, etc. Check your steering fluid level to make sure it is full and also look for bubbles on the dip stick. If everything looks good, start the vehicle and turn the wheels all of the way to the left and then to the right. Do this while the vehicle is in park and repeat at least 5 times. This will work out any air in your steering system. If the problem persists then the power steering pump may need to be replaced.

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1 Answer

Heavy steering while care is stationary.


At idle speed the the pressere deliver by your steering pump are low; try to modified your pulley to increase the speed at low idle.

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