Question about 2002 BMW 5 Series

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What is the correct procedure for removing the intake manifold actuator on a 2002 BMW X5 3.0 I have a leak, when I spray starter fluid on the actuator the idle speed go up. I had misfires and changed all 4 oxegen sensers and the problem got better but I still get P0171 and P0174 errors. I ordered a new intake manifold actuator, but don,t know how to remove and install. I also ordered the 2002 BMW X5 maintenance manual,

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Hey Polo. once you get the manual, read it.. read it and read it,, know it before you start.. take pictures of everything.. close-ups.. mark or identify every hose, line, can get "paint" markers" at hobby stores.. (I keep numerous colors in my shop at all times!) .just a dot of paint on a hose and on the connection will make reassembly so much easier!! Use one dot, ..then a two on.. get DIFFERENT colors.. TAKE YOUR can get some containers.. put the bolts/parts to the fuel injection system and air filter in one, the nuts, bolts, parts to the intake in another, the parts and pieces to the coolant system in another.. (ORGANIZATION!!).. all this wil make reassembly SO MUCH easier!! make sure you clean ALL gasket surfaces with a wire brush and NON-CHLORINATED brake cleaner.. use Permatex spray gasket sealer..(NOT SILICON!!). CLEAN gasket surfaces REDUCE the slightest chance of leakage!!
When you are retightening all the nuts and bolts, make sure you use a criss-cross tightening pattern. this should be covered in your not tighten the manifold bolts/nuts down to final torque the first time.. snug ALL first, then final tightening.. USE A TORQUE WRENCH!! IMPORTANT!!!!!

This is what I use:

Permatex 80064 High Tack Spray Gasket Sealant 4 Ounce Aerosol Can Walmart...
You can do this ...

Posted on Jul 17, 2017


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Read and check this link out. Car was throwing codes DISA valve

Posted on Jul 17, 2017


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6ya staff

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Posted on Jan 02, 2017


Jeremy Reddick

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SOURCE: Codes P0171, and P0174 bLean on a 98 Navigator. Any ideas?

O171 MAF (Mass Airflow Sensor) Just try cleaning this part it usually solves that problem without having to buy new part.

0174 Both are mass air flow sensors. The other problem can be a vacuum leak Check PCV valave and all vacuum lines. Also make sure fuel filter and fuel pump are working correctly. You can clean the MAF with some brake cleaner make sure it is dry before you install it back

Posted on May 28, 2009



  • 5081 Answers

SOURCE: P0313;Misfire Detected with low fuel P0171-System

P0313 - Misfire Detected with Low Fuel
P0174 -System too Lean (Bank 2).
P0171 -System too Lean (Bank 1).

P0171 and P0174 mean "system too lean" for banks 1

Posted on Oct 21, 2010



  • 1450 Answers

SOURCE: Mass Air Flow Sensor, oxygen sensor and coil plugs

look for vacuum leaks the last 4 codes are lean codes
primarily lookm at the pcv hose noturious for collapsing

Posted on Sep 16, 2008


  • 858 Answers

SOURCE: bmw e39 diesel auto how do i know if intake

yes its got a gasket so mi gather you think its leaking?
you can spray soapy water on the [cold] engine to see if & where its bubbling which indictes a leak!
Cheers Rob

Posted on Aug 15, 2009


Bill Schilz

  • 2049 Answers

SOURCE: p0171 and p0174 codes

P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)

If a car has a check engine light on and has P0171 and P0174 codes stored, the most likely cause is a vacuum leak. These codes are set by the car’s computer when it sees too much oxygen in the exhaust. Excessive oxygen readings in the exhaust will set lean codes. This does not mean that the oxygen sensors are defective. It is a common mistake for people to replace oxygen sensors when lean codes are present. Just because the code is related to oxygen sensor readings, it doesn’t mean that the oxygen sensors are bad. If both of these codes are stored this means that both banks of the engine have excessive oxygen in the exhaust. If the oxygen sensors are replaced it’s most likely that the same codes will reappear. It is very uncommon for two oxygen sensors to fail at the same time.

Therefore the most likely cause of P0171 and P0174 codes is a vacuum leak. The source of a vacuum leak can be one of many things. The most common cause of a vacuum leak is a leaky hose. Vacuum hoses over time can become dry and brittle. The rubber deteriorates and can leak causing a vacuum loss. Many times a leaky vacuum hose can be found by listening for a hissing sound. A large vacuum leak can even make the car run rough at idle. In some cases it will not idle without feathering the gas pedal.

Posted on Sep 10, 2009

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3 Answers



check the line from the battry to the starter..maybe some fuse busted.


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I have antifreeze leaking into the throttle body on a 2002 BMW 530i, what should i check for?

EGR valves connect to the intake manifold and are subject to corrosion. Check that this unit is not leaking . have a coolant pressure system check done.
Run fault codes to check if a sensor is leaking.

Feb 03, 2015 | BMW Cars & Trucks

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Where is the starter located on a 96 bmw 328i

The starter is located under the intake manifold here's a pic with the manifold removed.


To remove the starter there are 2 options remove the intake manifold or remove the transmission.

Apr 12, 2011 | 1999 BMW 328 Series

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Starter needs to be replaced. Need instruction procedure for a do it yourselfer.

Hi, I have pasted the procedure from below. Because this requires removal of the intake manifold, please be as sure as possible that your starter needs replacement. If you have any doubt, please let me know what your symptoms are and what troubleshooting you have done that led you to believe your starter is bad. Also, if you have any questions about the procedure below, please let me know. Thanks for using FixYa.

Removal & Installation

Disconnect the Negative battery cable

Relieve the fuel system pressure (you can do this by placing a rag over the schrader valve on the fuel rail and pressing in the valve stem--just be careful not to spray fuel on your eyes).

Drain the cooling system.

Remove or disconnect the following:

  • Intake manifold heat shield
  • Sight shield
  • Coil module connectors from the coil modules located on the valve covers
  • Positive Crankcase Ventilation (PCV) hose and valve from the valve cover
  • Fuel regulator vacuum tube
  • Vacuum tubes from the AIR solenoid
  • Fuel inlet and return lines
  • Fuel rail bracket retaining nut at the rear lift bracket
  • 2 pushnuts attaching the engine coolant heater wire and set it aside, if equipped
  • Fuel injector electrical connections
  • Fuel rail and injectors
  • Plenum duct clamp at the rear of the intake manifold, loosen
  • Intake manifold bolts and the manifold
Clean the manifold mating surfaces.

Remove or disconnect the following:
Starter electrical connectors Starter motor


Fig. View of starter motor removal and wires

To install:

Install or connect the following:

  • -S- terminal wire. Torque the nut to 35 inch lbs. (4 Nm).
  • Starter electrical connectors. Torque the nut to 89 inch lbs. (10 Nm).
  • Starter motor
  • Mounting bolts. Torque the bolts to 22 ft. lbs. (30 Nm).


Fig. Intake manifold torque sequence- 4.6L engines

  1. Grease the inside edge of the rubber plenum duct.
  2. Position the intake manifold by performing the following sub-steps:
    1. Place the rear of the intake manifold into the plenum duct.
    2. Place the front of the intake manifold downward on to the cylinder heads.

  3. Install the intake manifold bolts and torque to 89 inch lbs. (10 Nm) in the sequence illustrated. DO NOT torque the intake manifold bolts when the engine is HOT or at operating temperature.
  4. Make sure the plenum duct is fully attached to the rear of the intake manifold and tighten the plenum duct clamp to 20 inch lbs. (2.25 Nm).
  5. Install or connect the following:

    Fuel rail and injectors and tighten the rail retainers to 89 inch lbs. (10 Nm) Fuel injector electrical connections Alternator coolant pipe/surge tank pipe and position onto the fuel rail studs Engine coolant heater wire onto the studs and install the pushnuts, if equipped Fuel rail bracket retaining nut at the rear lift bracket and tighten to 89 inch lbs. (10 Nm) Fuel inlet and return lines Vacuum tubes to the AIR solenoid Fuel regulator vacuum tube Positive Crankcase Ventilation (PCV) valve and hose to the valve cover Coil module connectors to the coil modules located on the valve covers Sight shield Intake manifold heat shield Negative battery cable
  6. Fill and bleed the cooling system.

Mar 31, 2011 | 2002 Cadillac Deville

1 Answer

Hi, I use a Nissan Altima 2002. Sometime ago the car overheated badly and I had to change the top cylinder with gasket including radiator from single cell to double cell. It worked. But another problem...

You have an intake leak, either a vac hose isn't on, or the intake manifold gasket or throttle body gasket isn't sealing as it should. Spray some starter fluid around the intake area and focus in on the area where the motor revs.

Mar 01, 2011 | Nissan Altima Cars & Trucks

3 Answers

Have you ever heard of the intake gasket going on the 540i 3 times , its hard to keep running, sputtering no power. i just bought the car and this is what is said to be the problem

you can check the intake gasket buy spraying some starting fluid near the intake while the car is running if the engine speeds up the gasket is gone. you intake could be no good

Jun 16, 2010 | 2001 BMW 5 Series

2 Answers

My hyundai accent '95 misses when its cold.

Comment from the FixYa Moderator Staff:

I DISAGREE with the solution provided by Eliase.

You should NEVER spray 'starting fluid' in the engine compartment.

Starting fluid contains ether, and is extremely flammable.

Usage of staring fluid to look for vacuum leaks is a potentially dangerous situation.

I respectfully request that you refrain for using starting fluid.

What you CAN use, however, is a commonly found product, namely carburetor cleaner. This chemical is less flammable, and is used very often in the automotive business. Spray the carb cleaner near the intake manifold(s) where they connect to the block. If the idle changes, you have found the area that needs attention.

I would also doubt that you have a head gasket issue.

Oct 02, 2009 | 2002 Hyundai Accent

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