What 78 owners told NHTSA about the 2018 BMW 5 Series Hybrid Sedan Phev

Passenger seat occupancy sensor faulty causing restraint system malfunction and seat belt warning

NHTSA ODI 11697612

The seatbelt/passenger seat fails to recognize a passenger is occupying the seat and turns off the airbag. This issue has been reported many times to BMW and on vehicle forums. This is an expensive fix ($2800) that should be issued a recall by the manufacture and not passed onto the owner of the car.

NHTSA ODI 11654120

i was just driving my bmw and a airbag light and a malfunction error popped up on my dashboard, that read that the Passenger restraint system has malfunctioned. and i was doing some research on what was wrong with my car, and all the forums are indicating that this is a very common issue on these cars due to a bad seat occupancy sensor mat. to fix this you either still have to have an extended warranty if you don’t have one you have to pay upwards of 3,000$ to get this part replaced at a dealer. and me personally i don’t have the money to just spend on car repair of that amount and im sure alot of the other people with this same problem are in the same boat as me. this could be very dangerous because it puts all my passengers at risk if i were to get in a auto collision it would be devastating. i mean this should 100% be a recall because of this is a wide spread problem that puts many many people at risk. i haven’t been to the dealer with it yet, but i can self diagnose because countless people have been reporting on forums and online the same issue with the same error on the dash. my car hasn’t been in an accident yet so i haven’t had it inspected by insurance companies or police. this problem first appeared today and my heart dropped.

NHTSA ODI 11648020

Constantly pops up a message for passenger restraint system malfunction. I had an accident where I swerved off the road into a ditch at about 60 mph. I the driver was not hurt and the passenger wouldn’t have been hurt either if it was for the passenger seat belt not locking correctly at first and then repeatedly locking and unlocking the entire time hurting his chest.

NHTSA ODI 11641549

The Passenger Restraint System Malfunction warning light comes on randomly. Also the passenger side seat belt light comes on even if I put my wallet or something very light on the seat. I previously replaced the driver side seat sensor because the restraint system error was coming on. It seems odd that this critical component would fail in both seats by year six.

NHTSA ODI 11634005

Car randomly shows “Passenger restraint system malfunction”. I have read multiple complaints from other BMW owners about this issue that is not covered under BMW warranty.

NHTSA ODI 11595827

When i have a passenger in the car I will intermittantly get the warning "Passenger restraint system malfunction" which will turn off the air bag to the passenger side when driving even when there is a passenger in the car. From forums it sounds like there is a pressure pad in the seat that is a very common malfunction for BMW. This seems like a pretty critical part to ensure the airbags are operational when a passenger is in the car, and feel it should not be as common a problem as it seems to be.

NHTSA ODI 11591952

Passenger Restraint System Malfunction keeps coming on. I have not done any modifications to the car, it comes on during the morning when maybe the weather is a little damp. Has happened twice in a month.

NHTSA ODI 11591199

My car is producing a warning light for "Passenger restraint system malfunction". This is a safety hazard and it is not covered by warranty. I believe this should be investigated and a recall should be mandated as many people have this issue. The cost to fix is over $2,500 and BMW should bear the cost of this safety issue.

NHTSA ODI 11586947

Passenger seat restraint malfunction error code. Code will show fault when no one is in the passenger seat and if the person is light enough in weight, it will also pop up. The issue means that the air bag will not deploy when there is someone in the seat. A HUGE safety concern and online search shows that this is a very common problem with BMW’s. BMW needs to issue a recall for this and fix the issue. Please note that the date the incident occurred below is an approximation and the code has been continuing since the first code came up.

NHTSA ODI 11586573

Passenger restraint system malfunction cause by faulty sensors that are not covered by warranties.

NHTSA ODI 11584457

Passenger Restraint system malfunction warning keeps appearing. This car has never been in an accident or had any moisture, spills etc. that would cause that to happen. I'm reporting it as an issue due to the many complaints by BMW customers with the same issue. BMW charges $2500 to fix for this very common problem.

NHTSA ODI 11576351

I continually get the message 'passenger restraint system malfunction' Was meant to be repaired under warranty in 2022, it came back, but problem persisted intermittently since.

NHTSA ODI 11574500

The passenger seat is a mess. There are two issues that repeatedly happen on this car. One - there is false passenger seatbelt warning and two their is a passenger restraint system malfunction message. I took this to the BMW dealership and they said it requires a sensor mat replacement that costs over $2000. I looked it up online and found many people have had the exact same issue with this car.

NHTSA ODI 11563427

I recently took my vehicle in for a service due to "passenger system restraint" error code. Upon dealer inspection it would cost upwards of 4,000$ to fix this issue. I called my warranty company and they do not warranty any repairs that have to do with restraint systems. This seems to be a widespread issue from what I have read. This can really cause a major issue if the seatbelt for the passenger side does not work upon a collision. This has to be putting people in a serious situation and should be investigated. Thanks for your time.

NHTSA ODI 11546552

My car has around 74k miles on it. I had the following service request warning present itself this last week, 'Passenger restraint system malfunction:' on my drive into work in the morning. At first I dismissed the message and closed it to see if it would clear itself. It did not clear. It came back up a couple of minutes later. This time I left it alone. It proceeded to close itself and reopen every minute or so for about 10-15 minutes. Then it turned off and didn't come back on until I started my car later in the day and again the following morning. After taking it into the BMW dealer, the warning light was able to be replicated by the dealer and they've told me it is the seat mat (occupancy sensor) that was faulty. No outside influence appears to be at fault for the failure. Just that the part went bad. This is the diagnostic message given: CHECK CONTROL MESSAGE PRESENT FOR PASSENGER RESTRAINT MALFUNCTION. PERFORMED VEHICLE TEST, FAULTS PRESENT REGARDING PASSENGER FRONT SEAT OCCUPANCY DETECTION. PERFORMED TEST PLAN AND INDCATED PASSENGER SEAT OCCUPANCY DETECTION IS FAULTY. RECOMMEND REPLACING PASSENGER SEAT OCCUPANCY DETECTION. According to the dealer, if this if not fixed the airbag and/or seatbelt won't perform in the event of an accident. This appears to be a very common issue for BMW and similar to a 2017 BMW Technical Service Bulletin MC-10146769-9999. There was no warning of this issue prior to receiving the error message. There has been no opportunity for moisture to compromise the sensor (via window, sunroof or drinks spilled). Nor has any cellphone been stored on the passenger seat as I've read of some reasons provided to other Owners with the same error message. This seems to be an ongoing issue with this part for some time and it would seem to be an important issue for BMW to resolve in their design for the safety of the user.

NHTSA ODI 11542421

Passenger Restraint System Malfunction. This is what randomly and constantly pops up. The fasten seat alert goes off the whole time I’m riding, although no one is in the passenger seat. I took it to the BMW service center twice and each time they keep my vehicles for hours, just to say they couldn’t duplicate the issue.

NHTSA ODI 11429174

Passenger seat belt warning light activates even though there is no one or anything in the passenger seat.

NHTSA ODI 11427961

VEHICLE WILL INTERMITTENTLY DISPLAY A FASTEN SEAT BELT WARNING MESSAGE WITHIN THE INSTRUMENT CLUSTER ALONG WITH A WARNING TONE EVEN THOUGH THE DRIVER'S SEAT BELT IS BUCKLED AND NO OTHER PEOPLE ARE IN THE CAR AND NO WEIGHT IS ON THE OTHER SEATS. MESSAGE OCCURS WITHIN A COUPLE MINUTES OR DRIVING AND WILL SELF-CLEAR AFTER ABOUT A MINUTE. PROBLEM OCCURS SEEMINGLY RANDOMLY AND INTERMITTENTLY.

NHTSA ODI 11205860

WHILE DRIVING MESSAGE WILL POP UP REGARDING PASSANGER'S SEAT BELT AND EVEN DRIVER WAS FASTEN THE SEAT BELT MESSAGE WILL POP UP IN THE SCREEN TO FASTEN THE SEAT BELT. IT WILL START AFTER 20 MINUTES OF DRIVING.

NHTSA ODI 11133641

PASSENGER RESTRAINT MALFUNCTION ERROR. THIS SHOWS UP ON STARTUP. I HAD THIS PROBLEM EARLIER AND SOME HOW THAT GOT GOT CORRECTED.

NHTSA ODI 11124360

FOR A FEW MONTHS NOW, MY CAR HAS BEEN THROWING A "PASSENGER RESTRAINT SYSTEM MALFUNCTION" ERROR. IT HAPPENS SPORADICALLY AND ONLY STAYS UP FOR BETWEEN 1 AND 5 MINUTES AT A TIME. IT WILL HAPPEN WHETHER THE CAR IS MOVING OR NOT, AND EVEN SOMETIMES AS SOON AS I TURN THE CAR ON. I HAVE BEEN SUBMITTING THE TELECOMMUNICATIONS SINCE IT STARTED. I TRIED TO HAVE IT FIXED BY THOMPSON BMW, ONLY TO BE TOLD, LIKE THE OTHER USER WHO HAS THIS PROBLEM ON HERE, THAT THEY THINK MOISTURE IS THE CULPRIT. I HAVE NEVER HAD ANY RAIN OR ANY OTHER MOISTURE GET INTO THE CAR, AND EVEN IF IT DID, THIS WOULD BE A HUGE SAFETY RISK. THOMPSON REFUSED TO FIX IT AND SAID I WOULD HAVE TO COME OUT OF POCKET FOR THE SEAT, WHICH IS RIDICULOUS. I HAVE BEEN IN CONTACT WITH THE SERVICE MANAGER, AND THE CAR IS SCHEDULED TO GO BACK TO THE SHOP SOON. I WILL UPDATE WITH ANY DEVELOPMENTS, BUT IT WOULD APPEAR THAT MINE IS NOT AN ISOLATED INDECENT.

NHTSA ODI 11110925

RECEIVED AN ERROR MESSAGE ON BMW 540I 2018, WITH 10600 MILES. PURCHASED AS FACTORY DEMO A LITTLE OVER A MONTH AGO. WILL BE TAKING IT TO SERVICE SOON. HOWEVER I UNDERSTAND THIS IS A LONG STANDING ISSUE WITH BMW-S THAT THE MANUFACTURER IS NOT CORRECTING OR ISSUING RECALLS.

NHTSA ODI 11109656

CAR ISSUED A SAFETY WARNING CONCERNING, "PASSENGER RESTRAINT SYSTEM MALFUNCTION" STATING THE PASSENGER RESTRAINT SYSTEM IS LIMITED. WARNING SHOWS UP WHEN PASSENGER SEAT EMPTY AND WHEN CAR IS STATIONARY OR MOVING. DEALERSHIP SERVICE CENTER VERIFIED VEHICLE HAD ERROR CODE BUT STATED THEY "BELIEVE" IT IS MOISTURE IN THE SENSOR AND INSTRUCTED ME TO REDIRECT AIR CONDITIONING TO FLOOR WHEN WARNING COMES ON SCREEN. CONCERNED ABOUT WHETHER THIS IS REALLY JUST A SENSOR PROBLEM THAT SHOULD BE IGNORED OR IF THERE IS ACTUALLY A SAFETY PROBLEM WITH THE RESTRAINT SYSTEM.

NHTSA ODI 11079206