2008 BMW 335I Problems

What owners report

Owners of the 2008 335i most often describe sudden loss of engine power — a stumble, shake, or long crank followed by a stall or limp mode — which complaints typically attribute to the high-pressure fuel pump and describe at low mileage. The second common theme is electrical: wiring at the air-conditioning blower, headlight housings, and heat/AC connectors, plus airbag-related restraint warnings and the Takata driver-side inflator recall. Many reports come in well under 60,000 miles, and the fuel-pump reports in particular appear early in ownership.

1. 1
   Fuel system

   High-pressure fuel pump failure / sudden power loss

   • 69 complaints (34%)
   • median 23,000 mi at 2.6 yrs old (65 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2008–2026

   Owners describe long cranks when cold, a shudder or shake under acceleration, the check-engine light, and a drop into reduced-power mode, sometimes followed by a stall while cruising on the highway. Complaints frequently say the high-pressure fuel pump was replaced, sometimes more than once, and that a later recurrence was answered with a software reflash rather than a new pump. Several owners report that a dealer could not replicate the symptom after repair. Mostly reported between roughly 2,000 and 40,000 miles, often within the first year or two of ownership; a smaller number recur well past 80,000 miles.

   3 related service bulletins

   What to check: Ask whether the high-pressure fuel pump has been replaced and on what date, and whether any software update was applied afterwards. On a test drive, note any long crank when cold and any hesitation or shudder under load.

   2 excerpts from owner complaints in NHTSA records

   “I have a 2008 Bmw 335I convertible. On two occasions, the fuel pump has malfunctioned coming off of the freeway in los angeles, resulting in complete lack of power. This has put me and my family's life in danger. I have read countless other reports of this occurring. Please make Bmw issue a recall, asap before someone gets seriously injured.”

   NHTSA complaint #10243352, filed 2008-09, 8,000 miles

   “High pressure fuel pump failure could be the low pressure fuel pump not so sure got codes p3090 confirmed and p142e pending. The car was in motion when doing a turn the vehicle started to bog out and roughly idle I immediately turned to the right and shut the vehicle off tried to start it about three times in one minute intervals car would bog out and shut off threw me those two codes and a check engine light.”

   NHTSA complaint #11290225, filed 2019-12, 152,227 miles
2. 2
   Air bags

   Airbag and passenger restraint warnings (incl. Takata

   • 41 complaints (20%)
   • median 60,000 mi at 6.0 yrs old (19 state mileage)
   • 4 mention a crash, fire or injury
   • filed 2009–2018

   Owners report a persistent passenger-restraint warning that stays on with someone in the passenger seat, and say the seat-belt tensioner or seat mat sensor was replaced without a lasting fix. Complaints also describe waiting for Takata driver-side inflator parts after recall notices, and one report describes airbags failing to deploy in a collision while another describes deployment in a very low-speed impact. Warnings appear from about 45,000 to 100,000 miles in the sample; recall-related complaints are tied to notice dates rather than mileage.

   Recall 24V513000Recall 20V0170005 related service bulletins

   What to check: Check the VIN with a dealer for open airbag campaigns, including whether the driver-side inflator and any replaced steering wheel have been addressed, and confirm the passenger restraint warning is off with an adult in the seat.

   2 excerpts from owner complaints in NHTSA records

   “Car: 2008 Bmw 335I issue: driver side front airbag and passenger side head/curtain airbag deployed in a very lowspeed crash (less than 5 MPH) my wife was driving our 2008 Bmw 335I on a street (hwy 6, houston, tx) in bumper to bumper traffic when the car in front of her suddenly slowed down. My wife reacted a bit late and gently hit the car in front of her. There was a small scratch on the rear bumper of the other car (vw beetle) and a small dent on the front bumper of the Bmw. …”

   NHTSA complaint #10379285, filed 2011-01, 39,950 miles

   “Pass. Restraint passenger error massage, appeared the first time, I replaced the seat belt tensioner, the error massage disappeared, then came back on about 5 months after. I have a convertible model.”

   NHTSA complaint #10615608, filed 2014-07, 65,000 miles
3. 3
   Engine cooling

   Coolant pump failure and overheating

   • 12 complaints (6%)
   • median 63,000 mi at 7.2 yrs old (12 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2013–2019

   Complaints describe an over-temperature warning followed within seconds by a loss of power, sometimes leaving the car stopped in traffic; some owners report the electric coolant pump replaced more than once, and others mention coolant hoses or the radiator being replaced after overheating. A settlement document in the service-bulletin list covers the electric engine coolant pump on this engine family. Reported from roughly 56,000 to 100,000 miles in the sampled complaints, often during normal driving with the gauge reading normal beforehand.

   2 related service bulletins

   What to check: Ask for records of coolant pump replacement and check for coolant residue or a brown, seeping upper hose. Watch the temperature display on a long test drive, including at idle with the air conditioning on.

   2 excerpts from owner complaints in NHTSA records

   “I purchased this vehicle and the waterpump I changed two times, keep overheating and almost getting in fire flames, I need help please can someone help me, it should not happen to get to this level, I spend all my money most of the time on my car. The waterpump stop working smoke comes out of engine,become so hot that burned my face two time,when waterpump when wrong,hit my oil cooler,radiator,and much more stuff alone.”

   NHTSA complaint #10898716, filed 2016-08, 89,235 miles

   “I was driving my car getting on the freeway and the electrical system came on stating engine temperature, engine temperature is high. Drive moderately to cool the engine. If temperature increases again. Have the system checked by your Bmw dealer ship. I recently purchased this car on 6/9/2014 on the 30th day the car had this issue with me. The car turned off 4 times with me as I tried to drive back home. My 2008 Bmw 335I series was purchased with only 60,000 miles on it. …”

   NHTSA complaint #10610079, filed 2014-07, 61,000 miles
4. 4
   Electrical system

   Electrical wiring and blower-motor damage

   • 11 complaints (5%)
   • median 80,500 mi at 9.5 yrs old (10 state mileage)
   • 4 mention a crash, fire or injury
   • filed 2013–2019

   Complaints describe a burning-plastic smell while driving, the air conditioning quitting, and inspection finding the blower-motor wiring burnt or broken. Other reports describe smoke and fire in the dashboard area and melted insulation inside the headlight housings, and some owners note the heat/AC blower connector recall repair could not be completed because parts were unavailable. Mostly reported between about 55,000 and 110,000 miles in the sample, often while driving in traffic.

   Recall 17V676000Recall 13V0440003 related service bulletins

   What to check: Ask whether the blower-wiring recall and the fuse/circuit-breaker campaign were completed, and check that the blower works on every speed. Look at the headlight housing wiring for cracked or missing insulation if you can.

   2 excerpts from owner complaints in NHTSA records

   “9/11/2013 at approximately 9:25 am est my 2008 Bmw 335I spontaneously caught fire from what seems to be an electrical problem in the dash board area. I was making my daily commute to work when the AC unit shut off and then turned back on with thick black smoke pouring into the cabin of the car. Naturally I rolled the windows down to allow the smoke to clear so that I could pull over out of traffic. …”

   NHTSA complaint #10543454, filed 2013-09, 69,000 miles

   “I have a 2008 Bmw 335I, and recently I noticed something that is a huge safety issue, and is a major fire hazard as well. Inside of the sealed headlight housing, is a wire harness that's used to power the headlights. That harness has several wires coming out of it, and each one of those wires has a protective colored insulated coating that distinguishes the wires from one another, such as power, ground, etc. …”

   NHTSA complaint #10905689, filed 2016-09, 81,000 miles
5. 5
   Engine

   Serpentine belt loss after oil filter housing leak

   Mentioned in 4 of 60 sampled complaints

   Owners describe oil leaking from the oil filter housing onto the accessory belt, which then slips, overheats, or breaks, taking out power steering and charging and sometimes stalling the engine. Complaints say the leak was found at a dealer visit for other work, and that the loss of assist made the car hard to steer at speed. Reported between roughly 59,000 and 82,000 miles in the sample, with one report right after a belt replacement.

   What to check: Have the oil filter housing gasket and cooler seals inspected for oil residue, and look at the belt for oil contamination or glazing. Ask whether the belt and tensioner have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “I just got belt replaced. About two weeks later the belt pops. The car lost power steering and then would not start. I've researched online n saw that its a design flaw in the 07- 08 335I's but Bmw is refusing a recall. Imagine if I was on the highway n it happened. Its terrible.”

   NHTSA complaint #10693108, filed 2015-03, 59,000 miles

   “The vehicle started making a loud knocking sound while driving on the highway at approximately 65 MPH. (video was taken) the oil pressure dropped, a battery indicator light flashed, the power steering went out, and the vehicle lost speed. I almost wreaked. I checked my steering wheel fluid and it was brown, an indication to me the power steering pump went out. A belt also snapped. I purchased an extended warranty that Bmw is telling me does not cover the A/C compressor. …”

   NHTSA complaint #10846503, filed 2016-03, 81,474 miles

Buying note. These reports concentrate on the fuel pump, cooling pump, and electrical wiring, so paperwork showing those repairs and completed recall campaigns matters more than mileage alone. A pre-purchase inspection by a shop familiar with this engine, including a cold start and a scan for stored fault codes, is the practical way to judge a specific car.

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.