Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2008 BMW 535xi owners, lightly cleaned up (personal details are redacted by NHTSA).
The vehicle's engine caught fire approximately 13 1/2 hours after last having been driven. I parked it in my driveway at 9pm on April 15, 2022. I was alerted to a fire in the engine by my neighbor at 10:30am on April 16, 2022. The entire engine was engulfed in flames, melting all of the plastic components. It burned through my hood and affected every part of the engine. We were able to get the fire out with a garden hose before it spread to the house and my parents' two other vehicles parked next to it. No one was burned while putting out the fire, but several neighbors and family members did breathe in the toxic smoke. 911 was called and the fire department confirmed the fire was out. The driveway under the vehicle has burn damage, but we haven't moved the vehicle yet to see the extent of it. The check engine light had been on since purchase. …
Station wagon lift gate has severe wiring failures between the lift gate and body. This problem is well known throught the blog community. Broken wires cause failures, and electrical danger, to the rear lighting system that includes brake, running, back up, and turn signals. Also effected is the rear wiper, defroster, and operation access to open and close the lift gate. Tailgate failure would prohibit emergency opening and access to spare tire and fuses. I have already spent $3,000 on one harness replacement (dealer) and am looking at another $3,000 to repair (dealer) more wiring that will restore the brake/running lights on one side (failed state inpection). The internal lighting diagnostics did NOT indicate any lighting problems or warning. Broken wires could also cause failures to some or all of the entire electrical system. Very dangerous.
Wednesday July 25th, 2018, as I was getting ready to leave work, I started my car which was parked in my company's underground garage and the interior became engulfed with smoke. I turned the car off and got out to check the engine. There was no smoke coming from the under the hood of the car. I got back into the car and started it again and more smoke entered into the car. I turned the car off and went back to my office to call aaa. Approximately 20-30 minutes later I went back to the car and immediately smelled smoke in the garage. As I approached the car it was completely filled with smoke but I could tell that the both the back and front window shields and the sunroof were scorched. My key fob did not work so I had to open the car with the key. With the door open the thick smoke escaped and then I was able to see the damage to the car as a result of a fire. …
I purchased my certified pre-owned 2008 BMW 535xi sports wagon from concord BMW on 09.01.2015 with 81,759 miles on it. On December 15, 2015 I was traveling at freeway speed when the rear air springs fully collapsed. I brought the vehicle to concord BMW's service department that very same day to determine what caused the failure. On December 17, 2015 I received an email repair estimate from BMW concord service advisor joey tiongson for $24,188.17 (I purchased the used vehicle for $17,400.00).the diagnosis was that clogged sunroof drains allowed water to travel down the framework of the vehicle and flood all the electronic modules. Timing of this incident is such that mid-December 2015 produced the first rainfall in our area due to california drought. My car was not exposed to any significant water prior to these first rains. …
The wiring harnesses in the tailgate have been both severed and otherwise damaged by the normal operation of the tailgate and liftglass. The hinges and wiring trays have sharp edges and the wire insulation material seems to be of a pvc material. It appears that this material is vulnerable to failure with only regular operation of the vehicle, however, the sharp edges of the harness tray in the tailgate hinges act as shears that have severed the wires. This presents several safety issues including the potential of fires from electrical shorts, malfunctioning and damage of control modules due to electrical shorts, inoperable rear-defogger system, inoperable keyfob remotes for entry and locking, loss of radio system including weather band for safety updates, etc. …
This is the 3rd complaint on the same vehicle I have placed. This vehicle has been in and out of the shop for the last 8 months and they have finally discovered that the rear of the vehicle, where the computer components are located, has been receiving water leakage from faulty plugs via the sunroof drainage system leading to the rear of the vehicle. Thus causing major malfunctions such as fuel injectors, starters, batteries, sensors, and indicators that major transmission malfunctions have occurred when what is really wrong is that all the computer components are drowning in water, corroded and rusted. This is faulty from the BMW factory and they know the problem exists and they refuse to recall this model vehicle. This problem can be found via the internet from many consumers experiencing the same problem. I have placed a complaint with BMW and they have done nothing. …
I discovered failures of multiple wires in the tailgate/rear window wiring harnesses. Through research online I have found this is a common problem with this vehicle over several model years - search for BMW e61 tailgate wiring problems. The failures are caused by a poor design where the wires entering the hinge guides (4) for the glass and tailgate are repeatedly flexed at a sharp angle until the insulation, then the copper wire breaks. Safety issues - possible electrical short circuit leading to fires (highest load is for rear defroster); lighting failures (rear high brake light, license plate lamps and others); reduced visibility due to loss of wiper/washer/defroster; rear glass latch opening while underway, possibly resulting in loss of cargo or ingress of exhaust fumes. This is not an easily repaired problem. …
I purchased a 2008 BMW 5 series wagon 9/1/2015 on california had its first rain storm causing catastrophic failure of the entire electrical system of the BMW resulting in a complete loss 12/16/115. The drain lines are a well documented and a BMW service bulletin was issued to dealerships. While driving on the highway, I experienced widespread system failure, tire warnings, transmission failure warnings and the suspension failed and the car dropped about 6 inches. The BMW dealership gave us $24,188.17 repair estimate for all the electrical components and wiring which is more than the value of the car
Tl* the contact owns a 2008 BMW 535xi. While driving approximately 60 MPH, the vehicle overheating warning indicator illuminated. The vehicle stalled without warning. The contact pulled over and the vehicle was restarted. The vehicle was taken to the dealer where it was diagnosed that the electric water pump failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 135,000.
Wiring and rear diversity antenna can become wet under rear hatch fairing. This has caused the comfort access to work with reduced range and or not work at all. Wiring harness on both right and left side have severed cables from opening and closing rear window portion of hatch.
Electrical complaints in other 535xi years
Frequently asked questions
How common are electrical problems on the 2008 BMW 535xi?
NHTSA has 26 complaints about the electrical system of the 2008 BMW 535xi, 37% of the model year's 71 complaints.
Is there a recall for 2008 BMW 535xi electrical problems?
No. NHTSA lists no electrical system recall for the 2008 BMW 535xi. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2008 BMW 535xi electrical problems start?
Half of the complaints with a recorded mileage happened before about 89,000 miles, and 5% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 4 fires and 2 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.