Rotate both thumbscrews 90 degrees to unlock and remove cover plate. Siren Alarm system Comfort access control unit Door control unit, front left Door control unit, front right. Fuse 1 Skip to content. Tags: Fuse box diagram BMW.
Terminal 15 relay Fuse and relay box in passenger compartment, fuses 6, 7, 9, 10, 30, relay R6. Terminal 30 relay Fuse and relay box in passenger compartment, fuses 13 — 15, 18 — 20, 22, 23, 25 — 28, 34, 45, 46, 49, 60, 70, 71, 76, Oxygen sensor in front of the catalytic converter Oxygen sensor behind the catalytic converter.
Crankshaft position sensor Camshaft sensor Electronics box E-box cooling fan Fuse box in passenger compartment Injectors. Boost pressure sensor Hall sensor Rail pressure control valve Evaporative canister purge solenoid svolume control. Oxygen sensor in front of the catalytic converter Crankcase breather EGR cooler change-over valve Swirl control solenoid Preheating control unit Oil level sensor. Boost pressure regulator solenoid Camshaft sensor Rail pressure control valve Fuel delivery control solenoid Throttle position valve.
Coolant pump MAP-controlled engine cooling thermostat Evaporative canister purge solenoid s Camshaft sensor. Oxygen sensor in front of the catalytic converter Oxygen sensor 2 in front of the catalytic converter Oxygen sensor behind the catalytic converter Oxygen sensor 2 behind the catalytic converter Crankcase breather.
Exhaust manifold flap Electronics box E-box cooling fan Fuel tank leak diagnosis Hot film air mass sensor.The secondary air system is used to improve catalytic converter efficiency and reduce the emission of harmful combustion byproducts in automotive exhaust.
For a short period after a cold start, the catalytic converter is not hot enough to efficiently combine unburned fuel with available oxygen. An electric air pump forces fresh air into the exhaust stream just before the exhaust enters the exhaust manifold.
This extra air supplies the catalyst with additional oxygen, thus speeding up the combustion of unburned pollutants and raising catalyst temperature rapidly. When the catalyst reaches what is called "light-off temperature" approximately deg F or deg C it is capable of self-maintaining a high temperature and the high efficiency of combustion.
At that point the secondary air system may be shut off. The secondary air system is prone to faults that illuminate the check engine light. If you have fault codes for your secondary air, check the operation of the pump. You can test the function of the secondary air components using a BMW scan tool. If you do not have access to one, you can check secondary air pump function when starting the engine.
When a cold engine is started, the secondary air pump will run for a calculated amount of time. The check valve is the most common part to fail. On early X3 models, a flow meter is used on the inlet of the pump to confirm pump operation. In this tech article I will show you how to test the secondary air system valve on 6-cylinder M54 engine. To avoid marring the paint and trim, work with a plastic prying tool or wrap a screwdriver tip with masking tape before prying out body or interior items.
Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle.
If working with the electrical system, disconnect the battery before beginning.
Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.
Vehicle models change and evolve as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below.
When leaving a comment, please leave your vehicle information. An electric air pump red arrow forces fresh air into the exhaust stream just before the exhaust enters the exhaust manifold blue arrow. Large Image Extra-Large Image. To test the pump, I suggest removing the outlet hose and gaining access to the electrical connector.
First you have to disconnect the secondary air pipe from the pump to valve connection yellow arrow.Fix the error quickly and favourable with autoaid.
Our diagnostic tools as well as our automotive experts will help you in finding the cause of error and assist you with the best repair solution. Depending on the diagnostic tool that was used the error can be displayed in different formats. All ECUs, read and clear fault codes, service reset, sensors, actuators, special functions. Toggle navigation. Error code conversion. Air conditioning: actuators without function Air conditioning: air outlet zu low Electrical system: alternator without function Lighting: bulb of high beam headlights glowing Central locking: central locking not locking with remote control key Air conditioning: change temperature from degree celcius to degree fahrenheit Instument cluster: consumption display malfunction Fault code quick search: convert fault code Body exterior: Door cannot be opened from the outside.
Fuel preparation: Engine is not starting Fuel preparation: fault code camshaft adjustment Airbag: fault code seat occupation sensor Airbag: Fault code sidebag Engine: oil leakage on vacuum pump Chassis: Steering wheel vibrate at braking. Windschield washer: wiper not in end position Lighting: xenon headlamp without function. Chassis: adjustment data for wheel alignment Chassis: adjustment data for wheel alignment Lighting: bulbs Lighting: bulbs Brake system: ESP as of 9.
Airbag: airbag control unit Transmission control: automatic transmission control unit Brake system: brake pressure sensor Fuel preparation: camshaft adjustment Fuel preparation: camshaft sensor Central electrics: central electronics Airbag: crash sensor Fuel preparation: engine bay overview Fuel preparation: engine control unit Fuel preparation: fuel injector Electrical system: fuse box at engine bay left Electrical system: fuse box at glovebox Electrical system: fuse box behind glovebox Fuel preparation: ignition coil Immobilizer: immobilizer Instument cluster: indicator lamp symbol Lighting: light modul Diagnostic connector: location of diagnose socket as of MY.
Electrical system: battery removing and installatio Transmission control: check automatic transmission oil Air conditioning: interior air filter remove and install Lighting: light switch dismantle and assemble Engine: power unit belt remove and install Tire pressure control system: Remove and Install tyre pressure sensor. Instument cluster: Remove combined instrument Body exterior: Remove door handle outside Body exterior: remove front bumper as of Brake system: reset brake pad wear indicator Inspection: service reset up to Air conditioning: safety instructions Airbag: safety instructions.
ECU Central Electronic 22 times read. ECU Light Control 16 times read.
ECU Light Control 15 times read. ECU Light Control 12 times read. Selected Vehicle.We are also constantly updating our Pierburg parts selection to give you the best possible selection of parts.
If there is anything you cannot find in our catalog please contact us and our knowledgeable customer service team will help you locate the part you need, fast. Current No. Pierburg was founded in as a steel trader in Berlin, Germany.
In Pierburg began manufacturing carburetors and quickly became the sole supplier to all German automakers, as well as a large contingent of international car manufacturers.
Nealry 90 years later, Pierburg is an industry leader in a variety of categories, especially pump technology. Pierburg pumps, like all of their parts, are manufactured with high quality materials while minimizing production costs.
Pierburg parts are lean, with a minimum number of parts and machining operations. This keeps their products robust and cost-efficient. They're also increasingly environmentally friendly - for example, all materials used for their single-vane vacuum pump are easily recyclable. If this is not the exact Secondary Air Pump Check Valve you are looking for, or you would like this part in a brand other than Pierburg, please contact us and one of our customer service experts will help you locate the exact part you need.
If a part fails, the original purchaser can purchase a replacement product, process an RMA for the defective item, and return the item for a credit of the original purchase price of that item. We will not provide a replacement or credit for any part not purchased directly from our store. This warranty is not transferable. Only the original purchaser of the part can receive a credit after they have purchased a replacement.
You must purchase a replacement part at the current price for that specific item prior to receiving any credit. You will be credited for your original invoice amount, less any discounts received.
This warranty does not cover any shipping costs. If the original part is no longer available from eEuroparts. If the original item or suitable replacement part is not available, then this warranty is void. We also provide inexpensive and guaranteed 3 day, 2 day, and Overnight shipping options, so if you need your Secondary Air Pump Check Valve tomorrow, eEuroparts.
Every eEuroparts. The item must be new and in its original manufacturer packaging to be eligible for a cash refund. If you would like to return an item or have questions about the process, please contact us and one of our customer service experts will be happy to help.
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Want to narrow your results? We are processing a warranty replacement order for you. Warranty replacement orders add a "hold" to your credit card in the amount of the replacement order. This "hold" will only be completed into a charge in the event that the warranty item is not returned to us within 1 week of receiving the replacement item or the item is being returned for reasons other than the warranty issue stated.
If you are using a debit card for this order the "hold" will temporarily make the full amount of the funds unavailable for your use. If you're using a debit card we suggest you switch to a credit card. Do I have your authorization to proceed? Please select your T-Shirt size below. T-shirts may not ship with your order. Please allow weeks for delivery This will not affect your orders shipment.My wife has a i withmiles.
I had a problem with the ready monitor being set for State inspection. The code is secondary air system bank 2. My wife has been getting fuel at Mobil, which has alot of additives, at the same place for a year. When the car idles it blows smoke. My mechanic said it was oil but it is a combination of oil and water. The car runs great and the gas mileage it ok. Tried to get it to pass inspections several times but the secondary air system wasn't ready.
I decide to take it to the local BMW dealer to see what they found. They had the car for 2 days and the problem is carbon buildup on the heads. The secondary air valves and tubes were replaced but found low air flow caused by carbon build up on the heads coming back into the system. They said the heads need to be removed and rotor rootered. It is cheaper to just do an engine swap. I find this hard to believe that a car that drives tight and fast is destined for scrap metal.
I'm also thinking of trying to get my hands on the DOS program to see if I can get the car to get rid of that code and get the inspection done. Any other suggestions would be great. There is a company out with a product, that will put a bypass loop on the secondary air code. This will allow you to pass emissions testing. I think if you search you will be able to find it. This is a very common problem on theses cars. Good Luck! I think it's done through INPA or???? Do you mean 10k or I went to turnermotorsports.
I'm waiting for my cable to come in for Dis and the other software programs so if all I have to do is change it to Euro then I'll give that a shot. I'm also going to try and seafoam it tomorrow and hopefully I can remove some of the Carbon build up.The secondary air system is used to improve catalytic converter efficiency and reduce the emission of harmful combustion byproducts in the automotive exhaust.
For a short period after a cold start, the catalytic converter is not hot enough to efficiently combine unburned fuel with available oxygen.
M54 Engine Secondary Air System Testing
An electric air pump forces fresh air into the exhaust stream just before the exhaust enters the catalyst. This extra air supplies the catalyst with additional oxygen, thus speeding up the combustion of unburned pollutants and raising catalyst temperature rapidly. At that point the secondary air system may be shut off.
A check valve is usually installed in the secondary air pump duct in order to prevent back flow of hot exhaust gases into the air pump. The secondary air system is prone to faults that illuminate the check engine light. If you have fault codes for your secondary air, check the operation of the pump.
You can test the function of the secondary air components using a BMW scan tool. If you do not have access to one, you can check secondary air pump function when starting the engine. When a cold engine is started, the secondary air pump will run for a calculated amount of time. The check valve on the cylinder head is the most common part to fail.
In this technical article, I will show you how to replace the secondary air pump and the secondary air valve. The pump has to be removed to access the valve, so the procedures will be combined. Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.
Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle.
Fuse box diagram BMW 3 E90
If you are working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability. Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours.BMW Secondary Air N62
If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.
Working at right front of the cylinder head, using a flathead screwdriver; loosen the secondary air hose clamp.An air pump, also commonly referred to as a smog pump, is an emissions component that is part of the secondary air injection system. By injecting clean air into the exhaust, the amount of hydrocarbon pollutants produced by the vehicle is reduced, as the entire system is finely tuned to run with the air provided by the air pump.
When it failsthe overall performance of the engine may suffer due to the lack of air. Many states also have strict emissions regulations for their road going vehicles, and any problems with the air pump or the air injection system can not only cause performance problems, but also cause the vehicle to fail an emissions test.
Usually, a failed air pump will produce a few noticeable symptoms that can alert the driver that the vehicle requires attention. One of the first symptoms of a bad or failing smog pump is a rough running engine. When a smog pump fails the finely tuned air-fuel ratios can be upset, and it will negatively affect the performance of the engine.
The engine may have trouble idlingand may drop in engine speed, or stall when the pedal is pressed. Another common symptom of a bad air pump is a reduction in power output from the engine. Again, a failed smog pump can upset the tune of the vehicle, which will negatively impact overall engine performance. A failed air pump may cause the engine to hesitate or stumble on acceleration, and in more serious cases, cause a noticeable reduction in total power output.
Another symptom that may be indicative of a bad air pump is an illuminated Check Engine Light. This will usually only occur after the computer has detected the air pump has completely failed, or an electrical problem with the air pump circuit has occurred.
A Check Engine Light can also be caused by other problems, so it is important to have the computer scanned for trouble codes before making any repairs. The air pump is an important component of the emissions system, and necessary to keep your vehicle running in proper order so that it can meet the proper emission requirements. If you suspect that your air pump may be having a problem, or your Check Engine Light has come onhave the vehicle diagnosed by a professional technician, such as one from YourMechanic.
If necessary, they will be able to replace the air pump and restore proper performance to your vehicle. The most popular service booked by readers of this article is Exhaust and Emission System Inspection. Our certified mobile mechanics make house calls in over 2, U. Fast, free online quotes for your car repair. Schedule Exhaust and Emission System Inspection.
Service Area. Average rating fromcustomers who received a Exhaust and Emission System Inspection. Engine is running rough One of the first symptoms of a bad or failing smog pump is a rough running engine. Reduced horsepower Another common symptom of a bad air pump is a reduction in power output from the engine. Check Engine Light comes on Another symptom that may be indicative of a bad air pump is an illuminated Check Engine Light.
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