20 Most Recent 2008 BMW 328i Questions & Answers

Hi Eric- The air mass sensor may be either the wrong part or a faulty sensor. I would recommend trying another sensor. In addition please inspect the connector and make sure it is ok.

whats the symptom? are you losing water is it leaking?

If it turns on and off only once the self Diagnostic's and everything is okay however I would take vehicle to autozone or similar and have it scanned. If the light is flashing u have a bigger problem.

Your vehicle is now 5 years old so there is a really good possibility that the battery needs replacing. Try charging it and make sure the terminals and connections are nice and clean. If it won't hold a charge it's time to replace it.

Take off the fan (32mm open wrench - Craftsman at sears). Fan nut is LH thread which means righty loosey, not lefty loosey!!!!. Radiator shroud and fan come out (and go back) as one unit. Take off the belt. Thermostat is directly behind fan. Have the new one first so you know what you are looking for. It is held on by 4 10 mm bolts. Do NOT use any gasket sealer. It will gum up the engine. The thermostat has a rubber o-ring. That's all it needs.

If you have replaced it and it is working correctly, you can just erase the code or wait for it to shut off once you have driven it for a few miles. if you erased / reset it and it comes back, there is still a fault.

My guess would be to look at the secondary air pump, they are often the failure point for this error code... take some time to look at the pump (front passenger side of engine) look for cracked lines... check for power before you replace.

The pedal position sensor is placed by the acceleration pedal under the dashboard if it is left hand driven where your left foot accelerates and if it is right hand driven where your right foot accelerates.

well a good place to start is buying a repair manual and a gasket.

Visit a BMW dealer

Hi there's this website something like reliable-store and it is very amazing for manual for repairing servicing anything someone on fixya recommended it to me and I thank him even today They have full manuals and it's verrrrry cheap and mine I got free in offers 3rd time I bought it, I also had an issue with the file so the girl replaced it in 30 mins there is one website more but i don't remember its name it was 2 years back bitman something link this Try these out brother 14. There's a website that

Try here https://www.mahle-aftermarket.com/media/local-media-north-america/pdfs-&-thumbnails/torque3.pdf

Some fixya user told me a website reliablestore it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

The fuse is located next to the battery in the trunk If you need further help, reach me via phone at https://www.6ya.com/expert/gary_9c859f4aa7e5ab10

https://blog.bavauto.com/5929/bmw-fault-codes-p1421-p1423-secondary-air/

https://blog.bavauto.com/5677/bmw-e46-3-series-engine-electronics-fuse-pack-in-underhood-e-box/ Fuse 1 - 30A - DME, Injectors, SMG Hydraulic unit Fuse 2 - 30A - DME, Idle control valve, Fuel tank ventilation valve, Fuel pump Fuse 3 - 20A - E-box fan, Transmission RPM sensor, Camshaft positioning sensors, Mass airflow sensor, Fuel pump relay, Secondary air pump relay, A/C Compressor relay, Fuel tank leakage diagnostic module, SMG selector lever Fuse 4 - 30A - Oxygen sensors and oxygen sensor heater circuits. Fuse 5 - 30A - Fuel injector relay.