2003 MINI Cooper S Problems

What owners report

Owners of the 2003 Mini Cooper S most often report power steering problems: the power assist cuts out, sometimes intermittently and sometimes for good, across a wide mileage range. A second, smaller cluster of complaints covers windshield glass that cracks or chips readily, and a third covers warning lights and seat wiring faults linked to the airbag system. Engine, cooling and electrical complaints appear too, though less often in the sample.

1. 1
   Steering

   Power steering assist cuts out or fails

   • 114 complaints (53%)
   • median 79,000 mi at 8.7 yrs old (104 state mileage)
   • 18 mention a crash, fire or injury
   • owner-quoted repair $1,150 (median of 18 quotes)
   • filed 2004–2019

   Complaints describe the steering suddenly becoming very heavy, often mid-turn or at low speed, with the wheel sometimes returning to normal after the car is shut off and restarted. Owners report a whining or groaning from the steering area beforehand, and several say the steering pump and its cooling fan were replaced. According to the complaints, dealers often quoted repair costs and in some cases declined to cover the work, while owners noted that the assist could fail again after a replacement pump. Reported from as low as a few thousand miles up to well past 100,000 miles, with many complaints clustering between roughly 50,000 and 115,000 miles.

   Recall 15V6600005 related service bulletins

   What to check: Ask whether the power steering pump and its cooling fan have been replaced, and whether any warranty extension work was performed; on a test drive, turn the wheel at low speed and listen for whining or groaning. Check that assist is present from a cold start.

   2 excerpts from owner complaints in NHTSA records

   “Complete power steering failure, on surface road in castro valley, ca. The sudden loss of power steering caused me to continue straight, while trying to regain control of car, I continued into on coming traffic, if another car was in opposite direction a significant accident would have occurred. Prior to this failure this was no evidence of a repair needed.”

   NHTSA complaint #10421086, filed 2011-08, 88,000 miles

   “I purchased a 2003 Mini Cooper S used in november 2007. It had 30,000 miles. Shortly after purchase the power steering pump went out. The dealership replaced it promptly, dec. 2007. I am now experiencing intermittent power steering failure again, at 79,000 miles, 49,000 miles on a new pump. It comes and goes while driving. Very dangerous while taking curves.”

   NHTSA complaint #10369926, filed 2010-12, 79,000 miles
2. 2
   Visibility (wipers, defrost, mirrors)

   Windshield cracks and chips easily

   • 29 complaints (13%)
   • median 6,750 mi at 1.1 yrs old (18 state mileage)
   • 1 mention a crash, fire or injury
   • filed 2003–2007

   Owners describe windshields cracking from very small stone impacts, and in some cases cracks appearing without any obvious impact, often starting near the lower edge or center. Several complaints mention repeat replacement of the glass, and owners say the dealer attributed the damage to road debris rather than covering it under warranty. One complaint also describes the wiper motor losing its ground connection in heavy rain, which is a separate wiper concern. Mostly reported at low mileage, several under 10,000 miles and some within days of purchase.

   What to check: Inspect the windshield closely for chips, star breaks and previous repairs along the edges, and ask how many times the glass has been replaced; also test the wipers and washer on a wet day.

   2 excerpts from owner complaints in NHTSA records

   “Windshield cracked three days after purchase. I don't remember any stone damage being done. When I washed my car (hot day), a crack developed in the mid-right bottom border of my windshield. I brought it in to the service department, and they told me it was stone damage.”

   NHTSA complaint #10051390, filed 2003-12, 2,100 miles

   “The windshield on my 2004 Mini Cooper S just got a stress crack today. This has been a problem since the minis introduction and was supposedly fixed with reinforced a pillars on 04s. It has about 2500 miles on it. Many Mini owners would like this problem to be resolved, permanently.”

   NHTSA complaint #10045874, filed 2003-11, 2,500 miles
3. 3
   Steering

   Underhood smoke and fires near steering or cooling fan

   • 34 complaints (16%)
   • median 70,055 mi at 7.7 yrs old (30 state mileage)
   • 22 mention a crash, fire or injury
   • owner-quoted repair $1,350 (median of 6 quotes)
   • filed 2000–2017

   Several complaints describe smoke or flames from the engine bay, in some cases traced by owners or mechanics to the power steering pump or its cooling fan shorting and staying powered after shutoff. Owners report burning smells while driving and battery drain when the pump runs with the key out. Others describe fires in the engine compartment without a confirmed cause. Reported across the sample from about 52,000 to 145,000 miles.

   Recall 15V6600002 related service bulletins

   What to check: Ask whether the steering pump cooling fan has been checked or replaced; after a drive, confirm the fan stops when the car is switched off, and look for burnt smells or melted connectors near the pump.

   2 excerpts from owner complaints in NHTSA records

   “I purchased my '03 Mini copper s with 49k from a honda in mechanicsburg, pa dealer in august. In december, I purchased tires and then went to a self-service carwash afterward. When I got home and before I put it in the garage, I took out the hose and washed off the wheels and under the car. During the process there was white smoke, which I thought was steam from the water hitting the manifold. …”

   NHTSA complaint #10259432, filed 2009-02, 52,000 miles

   “On february 6, 2014 my Mini Cooper S was serviced at the dealership Mini cooper of concord for a recall in the power steering pump. Shortly, after in march my car started to smoke from the engine and my car bursted into flames. The fire department came and turned down the fire, however my car is a complete loss. I called Mini cooper of concord, however no one could provide help. I also emailed the head of the dealership and there was no response. …”

   NHTSA complaint #10588457, filed 2014-05, 145,126 miles
4. 4
   Engine cooling

   Rough running, misfires and power loss

   • 31 complaints (14%)
   • median 65,000 mi at 6.4 yrs old (23 state mileage)
   • 6 mention a crash, fire or injury
   • owner-quoted repair $1,005 (median of 5 quotes)
   • filed 2003–2020

   Owners describe hesitation or power loss, sometimes in first gear and worse with the air conditioning on, and one complaint reports a cylinder failing and the engine being beyond economical repair. Complaints also mention a cooling fan that keeps running after shutdown and a fuse failure that removed cooling and allowed overheating. Several service bulletins describe software updates for drivetrain and engine power warning messages. Reported across a wide range, from near-new to about 134,000 miles.

   5 related service bulletins

   What to check: Check for stored fault codes and ask whether the engine management software has been updated; on a test drive, accelerate from a stop with the air conditioning on and note any hesitation. Confirm the cooling fan runs when hot and stops after shutdown.

   2 excerpts from owner complaints in NHTSA records

   “One morning driving about 100 MPH going up to ct I pay a toll take off the car hesitates in first gear then goes ok about a 2 miles from the toll I am doing about 100 MPH and switch to the right lane and the car just stop giving me power so I go to change to 5th gear no luck so I let the car roll to the shoulder call Mini roadside and they tow to nearest dealer to my house. The dealer has my car for a total of 8 days and tell me the l/front axle will not stay in the transmission. …”

   NHTSA complaint #10153123, filed 2006-03, 41,900 miles

   “I had noticed that the power going up hills had been slowing down for sometime but as we were driving in town and lost it's number three cylinder, took it to shop and with several days of work found out I would be better off scrapping it than fixing it. Mechanic who deals with bmw said that he could put in a new engine but he sand that the issues that he has seen on this years cooper show it is just a money pit. He said, just scrap it and take your losses. The only thing is I bought it used and still owe over $3,000. On it. …”

   NHTSA complaint #10610540, filed 2014-07, 134,000 miles
5. 5
   Air bags

   Airbag warning light and seat wiring faults

   • 7 complaints (3%)
   • median 48,000 mi at 2.5 yrs old (5 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 2003–2020

   Complaints describe the airbag warning light coming on at random, sometimes after the seat is moved or adjusted, and sometimes after a battery replacement. Owners report the passenger seat occupancy mat or the wiring under the seat being replaced or repaired, with one saying the light returned after the repair. One owner also reported that airbags did not deploy in a rear-end collision. Reported from about 48,000 to 106,500 miles in the sample, often after seat movement or electrical work.

   What to check: With the key on, confirm the airbag light comes on at start-up and then goes out; slide and recline both front seats and see whether the light appears.

   2 excerpts from owner complaints in NHTSA records

   “Nothing really special happend other than the airbag light randomly came on. I didnt hit anything or hit a big bump. I adjusted my seat and I have read that Mini cooper may have made the wires underneath the seat too short so when you recline or move the seat forward for passengers it could trigger.”

   NHTSA complaint #10447967, filed 2012-02, 106,500 miles

   “Consumer's vehicle was involved in a rear end collision. The vehicle that rear ended consumer's vehicle pushed it into the vehicle that was parked in front. None of the airbags deployed. The repair shop reported the seat being broken. Consumer noted the seat hit the back of the calves and bruised them. Hit the steering wheel, fractured nose and received a concussion. Vehicle totaled with front end damage and a cracked windshield. Consumer was wearing her seat belt and was sitting pretty far back. …”

   NHTSA complaint #10042381, filed 2003-11, 9,000 miles

Buying note. The steering system is the main thing to verify on a 2003 Cooper S: ask for records of pump and cooling fan replacement and test the assist thoroughly. Also check the windshield condition and the airbag warning light, and have any pre-purchase inspection include a fault-code read for engine and electrical warnings.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.