2004 BMW 330I Problems

What owners report

Owner complaints for this model year center overwhelmingly on the bi-xenon headlights: the plastic reflector bowls inside the ZKW projector assemblies degrade and burn over time, and owners describe night-time light output that fades noticeably as the car ages. A smaller group of complaints concerns the Takata air bag inflator recalls and the front air bags not deploying or deploying unexpectedly. Most reports arrive between roughly 50,000 and 150,000 miles, and many describe a gradual decline rather than an abrupt failure.

1. 1
   Exterior lighting

   Xenon headlights dim as reflector bowls burn

   • 63 complaints (56%)
   • median 99,000 mi at 8.7 yrs old (45 state mileage)
   • 5 mention a crash, fire or injury
   • owner-quoted repair $1,200 (median of 13 quotes)
   • filed 2010–2023

   Owners of cars with the optional bi-xenon headlights say light output drops off over time until low beams barely illuminate the road at night, and some note a hot-plastic smell or smoke near the headlamps. Many who inspected the assemblies describe the plastic reflector bowls as scorched, cracked or melted, and report that new bulbs did not restore brightness. According to the complaints, dealers generally diagnosed the bowls as burnt and quoted replacement of the complete headlight assembly, which owners describe as expensive; the reflectors themselves are not offered separately. Reported across a wide mileage range, commonly between about 45,000 and 150,000 miles, and often noticed during night driving or after buying the car used.

   1 related service bulletin

   What to check: At night, park facing a wall and compare low-beam brightness on both sides; look inside each headlight for a dark, scorched or cracked bowl above the bulb. Ask whether the headlight assemblies have been replaced and keep in mind that replacements use the same bowl design.

   2 excerpts from owner complaints in NHTSA records

   “I recently purchased the vehicle and immediately noticed the poor light output from the factory xenons. I went online and found out that many people with the e46 sedan with xenon headlights manufactured by zkw have an issue of the projector bowls burning slowly over time due to poor material choice that cannot withstand the heat generated by the factory bulbs. …”

   NHTSA complaint #10920112, filed 2016-10, 106,000 miles

   “Over the last couple of years I have noticed that the headlights ability to provide good visibility at night has reduced dramatically, especially when raining or wet roads. I made sure the lenses were clear and new bulbs did not help. After doing some research on the internet I found thru several forums that this is a common issue with bmws' equipped with the zkw brand of bi-xenon headlights. …”

   NHTSA complaint #10786505, filed 2015-10, 100,000 miles
2. 2
   Air bags

   Takata air bag inflator recall and air bag concerns

   • 20 complaints (18%)
   • median 132,000 mi at 11.4 yrs old (6 state mileage, few)
   • 4 mention a crash, fire or injury
   • filed 2008–2026

   Several owners filed complaints about the Takata inflator recalls on this model year, describing long waits for parts, interim measures and uncertainty about whether their car was covered. Others describe air bags that did not deploy in a frontal impact, or that deployed in a low-speed curb contact, in some cases with injuries. Complaints span a wide mileage range, from about 30,000 to over 145,000 miles, with several filed years after the recalls were announced.

   Recall 20V018000 · DO NOT DRIVERecall 14V428000 · DO NOT DRIVERecall 15V318000 · DO NOT DRIVE7 related service bulletins

   What to check: Ask for proof that all open Takata recalls on this VIN have been completed, and confirm with a dealer using the VIN rather than relying on a visual check.

   2 excerpts from owner complaints in NHTSA records

   “I have a problem about fault in passenger restraint system affecting airbag,belt tensioner and force limiter. During driving I've got a warning displayed on my hud. I had brought twice to dealer,they said fixed,but after one week later the warning light come back again. They keep said that I need pay for fix it. Is this recalls part? I think it is safety defects. This model:Bmw 2004 530i please help. Thanks,”

   NHTSA complaint #10252035, filed 2008-12, 32,000 miles

   “I side swiped a curb at a weird angle and it caused my drive side and passenger side side air bags to go off. The driver airbag exploded with such force that it broken my collar bone severely enough that I had to have surgery and metal plates put it to hold it back to together.”

   NHTSA complaint #10722844, filed 2015-06, 120,000 miles
3. 3
   Exterior lighting

   Rear tail light and turn signal faults

   • 6 complaints (5%)
   • median 69,000 mi at 6.5 yrs old (6 state mileage, few)
   • filed 2010–2011

   Owners describe a tail light warning appearing even when the bulbs are fine, and in some cases one or both rear lamp functions stop working entirely. Several complaints trace this to corroded pins or burnt wiring and melted plastic in the tail light housing and harness, with dealers recommending rewiring or replacing the assemblies. Some owners whose cars were outside recall 11V438000 asked about coverage and were told their vehicle was not included. Typically reported between about 60,000 and 120,000 miles, often first noticed when a turn signal or brake light stops working.

   Recall 11V438000

   What to check: With the lights on, check that tail, brake and turn signals work on both sides, and pull the trunk trim to look for corroded or discolored connectors. Ask whether recall 11V438000 was performed on the car.

   2 excerpts from owner complaints in NHTSA records

   “The tail lights on both sides of my 2004 Bmw 330I have stopped working completely (no turn signal or brake lights) due to a burned wire. This began on the left side with the turn signal light going out. When I went to change the bulb, I realized the bulb was fine. Looking closer I saw that a wire in the wire harness had burned and melted the plastic. It also melted the metal on the tail light assembly. This was a couple months ago that this happened and now the right side has done the exact same thing. …”

   NHTSA complaint #10345568, filed 2010-07, 68,000 miles

   “2004 Bmw 330xi sedan (e46) rear tail light indicator light consistently comes on, even though there is no tail lamp failure. Dealer indicated it was a burnt contact, and suggested repairing both sides. Cost for both sides $254.67.”

   NHTSA complaint #10340449, filed 2010-06, 80,000 miles

Buying note. On this model year the headlights deserve the most attention: verify actual night-time light output before buying, since refurbishing or replacing the assemblies is costly. Also confirm with a dealer, using the VIN, that every open Takata air bag recall has been completed.

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.