2005 BMW 545I Problems

What owners report

Owners of the 2005 545i most often report the passenger airbag/restraint warning light coming on, usually traced to the front passenger seat occupant-detection mat, and an automatic transmission that jerks or slams during low-speed acceleration. Many complaints are filed by second or later owners who say the dealer confirmed the airbag work but told them their vehicle was not covered by the earlier campaign. Brake-pedal and electrical faults also appear, typically on higher-mileage cars.

1. 1
   Air bags

   Passenger airbag/restraint warning light (seat mat sensor)

   • 34 complaints (44%)
   • median 101,750 mi at 9.3 yrs old (28 state mileage)
   • 1 mention a crash, fire or injury
   • filed 2010–2020

   The passenger restraint or airbag warning appears on iDrive or the instrument cluster, often right after starting the car. Owners report being told by dealers that the front passenger seat occupancy mat, seat cushion, or seat-entry mat needed replacement, with some citing repair costs in the four figures. Many say they asked about a recall on the seat mat sensor and were told their VIN was not included, and some report the light returning after a sensor was replaced. Reported from roughly 40,000 to 150,000 miles, on cars of all ages including vehicles parked for a week before the light appeared.

   What to check: Turn the key and confirm no passenger restraint or airbag message appears, and have a passenger sit in the front seat to see whether the light clears. Ask for any prior seat-mat or occupancy-sensor repair paperwork and whether the vehicle was included in past campaigns.

   2 excerpts from owner complaints in NHTSA records

   “2005 Bmw 545I e60 fault in passenger restraint system: this model Bmw has experienced a fault in the passenger restraint system and is not listed in the past recall which can lead to dangerous situations if an accident occurs and the restraint system malfunctions. The problem is in the mat of the passenger seat and upon a passenger getting into my car about a year ago, I received the error message. …”

   NHTSA complaint #10779344, filed 2015-10, 105,000 miles

   “I turned on my car and a notification appeared on the idrive that there was a passenger restraint system failure. I read that there was a recall on this and called my local Bmw dealership to give them my VIN to see if my vehicle would be on the recall. I found out that it was not. I don't know what fits the criteria for the recall and if this would be considered normal wear and maintenance of the vehicle.”

   NHTSA complaint #10680728, filed 2015-02, 86,400 miles
2. 2
   Transmission and drivetrain

   Automatic transmission jerk or slam at low speed

   • 11 complaints (14%)
   • median 67,250 mi at 5.5 yrs old (8 state mileage, few)
   • filed 2010–2015

   Owners describe a hard jolt or bang from the transmission when rolling to a near-stop and then accelerating, and surging or hunting between gears around 30-40 mph. Several describe it as feeling like being hit from behind, and some note no warning light appears. Complaints mention dealers saying no fault code was stored, so nothing could be done under warranty, and a few link it to the mechatronic unit or transmission electronics. Mostly reported between about 35,000 and 110,000 miles, frequently in stop-and-go traffic at low speeds.

   What to check: Test drive in slow traffic and roll off the throttle and back on around 30-40 mph to feel for a slam or hesitation. Ask whether the transmission fluid and mechatronic unit have been serviced and whether any transmission faults were previously stored.

   2 excerpts from owner complaints in NHTSA records

   “I have a 2005 Bmw 545I. When I am decelerating and rolling towards a stop and then accelerate before a full stop I will get a large jerking transmission bang coming from the back of the car. In addition while driving the car around 35-40 MPH the transmission slips from one gear to the next and back causing the car to surge and jerk slightly.”

   NHTSA complaint #10357401, filed 2010-09, 98,625 miles

   “My 2005 Bmw 545I has a hesitation, and strong hard downshift present, under factory warranty I complained about this, and now outside of factory warranty I am still having issues, and no one is willing to do anything about it at my dealer basney imports. When calling bmwna they are unwilling to help until a hard code is present, even though the service advisor, and technicians have road around with me in the car, and felt the situation.”

   NHTSA complaint #10339918, filed 2010-06, 48,705 miles
3. 3
   Brakes

   Brake pedal needs heavy pressure to stop

   • 7 complaints (9%)
   • median 83,000 mi at 6.5 yrs old (7 state mileage, few)
   • filed 2010–2013

   Owners report the brake pedal going hard or dropping toward the floor, with the car slowing but not stopping unless unusual force is applied; some used the parking brake to stop. Several say a mechanic diagnosed a failed brake booster, vacuum pump, or a vacuum pump oil leak. Complaints reference the hydraulic power-assist vacuum campaign and note some vehicles were not eligible or the symptom returned after the campaign repair. Reported between roughly 40,000 and 112,000 miles, often at low speed in traffic and described as intermittent.

   1 related service bulletin

   What to check: At a standstill with the engine running, press the brake firmly and check that the pedal stays hard and high, and ask whether the vacuum pump and brake booster have been replaced or checked under the power-assist campaign.

   2 excerpts from owner complaints in NHTSA records

   “Coming to a stop sign, had to exert an unusual amount of force to the brake pedal to stop. Going to the dealer to have my brakes checked under the Bmw brake recall, I was told I had no oil in my brake line, but the car was diagnosed with a vacuum pump oil leak. Remedy was to replace pump and clean, for $1300. If you look on the Bmw e60 forum, and others, there are numerous identical complaints. Something has to be done.”

   NHTSA complaint #10407868, filed 2011-06, 83,000 miles

   “1. The events leading up to the failure - brake loss 2. The failure, how often it occurs, its consequences: this started about 3-4 months ago. I was driving about 25-30mph and had to stop because the light turned red. I stepped on the brakes but my car did not stopped. It felt like I was stepping on a brick but there was no brake pressure. I pulled the e-brake, turned off the car and turned it back on again and it was ok after that. I ignored that issue thinking it was just a phantom issue - just like most electrical issues with Bmw's. …”

   NHTSA complaint #10326412, filed 2010-04, 43,000 miles
4. 4
   Electrical system

   Electrical faults: idrive, battery drain, water ingress

   • 26 complaints (33%)
   • median 87,083 mi at 8.8 yrs old (22 state mileage)
   • filed 2006–2021

   Complaints describe a range of electrical symptoms: instrument clusters or iDrive displays that quit, cars that will not start or cut out while driving, warning lights for steering, brakes, and airbags appearing together, and one report of a melted rear lamp wiring connector. Some owners trace stalling and no-starts to water reaching the electronics module area, and others describe battery charge messages. Broad spread, from about 50,000 to over 180,000 miles, with several reports of sudden no-start or shutdown in normal driving.

   4 related service bulletins

   What to check: Check that all warning lamps behave normally at startup and that iDrive, windows, and audio work. Look for dampness or corrosion in the luggage compartment and ask about battery age and any water-intrusion repairs.

   2 excerpts from owner complaints in NHTSA records

   “On may 12th, I was driving my 2005 545I Bmw at 8pm with my wife and two children on the highway. The display indicated a windshield wiper malfunction (would not turn off or control speed of wipers). After a few more miles, I noticed there was no communication to any of the steering column controls, nor did the turn signals work (would not stay on unless held down). …”

   NHTSA complaint #10330465, filed 2010-05, 51,050 miles

   “My car have an overheated cable connection and is causing increased electric resistance, which is a recall and also the passenger airbag light is on and Bmw refuse to fix the issues.. They say my VIN wasn't one of the car that's in their database for the recalls........”

   NHTSA complaint #10515172, filed 2013-06, 120,000 miles

Buying note. These cars are now old enough that condition and service history matter more than mileage; verify the passenger restraint system, feel the transmission at low speed, and confirm the brakes stop the car without extra force. A pre-purchase inspection by a shop familiar with the model is worth the cost.

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.