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You should replace ALL THE TIMING components (idler pulley, tensioner and even crank and cam seals) not just the belt and water pump. The failure of the above parts can cause serious timing / engine problems. Zee
1. Disconnect battery ground (NEGATIVE) cable from remote ground terminal on shock tower. 2. Remove air cleaner resonator. 3. Remove three Transaxle Control Module (TCM) mounting screws. Move TCM to provide access to top starter mounting bolt. Do not disconnect TCM wiring. 4. Remove bolt attaching starter to transmission housing and remove starter from vehicle. 5. Raise and support vehicle. 6. Remove battery cable nut from starter and remove cable. 7. Disconnect push on solenoid connector. 8. Remove top bolt attaching starter to transaxle housing. 9. Reverse procedure to install, noting the following: Torque starter mounting bolts to 40 ft-lbs . Clean corrosion from wire terminals before connecting wiring to solenoid. If any of these steps aren't clear for you, take the car to a repair shop. Zee
Are the radiator cooling fan and fog lights working ? It seems the problem is with the IPDS (Intelligent Power Distribution System). It's a panel with the fuses and relays. BE CAREFUL with the IPDS!!!! do not attempt to remove the relays, they look the same, but they are not removable and interchangeable!! If there is a problem with the system, the whole panel needs to be replaced, otherwise a more serious problem can occur!! Better to take it to a good repair shop or to the dealer. Zee
Any brand of DEX III fluid is good. Zee
It's an easy one: 1-2-3-4-5-6 the right-front (passenger side) is the number 1 cylinder the left front is #2. So right bank: 1-3-5, left bank 2-4-6 Zee
On modern vehicles there are many control modules on different networks (CAN,MOST, VAN, LIN, D2B etc...) Could be a communication problem between modules on one of the network. It would be better to have the OE BMW code, instead of the OBDII because it's more specific. These type of codes are common if the battery goes down and modules lose power, however it can be a real network problem, which needs further diagnostics. There is a big possibility for other comm. codes in other modules, i.e. if there is a comm. problem between the DME (engine control) and EGS (transmission) the comm. codes will be registered in both - therefor both needs to be reset. Zee
There are repair manuals in every part store with step by step instructions and pictures. Cost about $15-20.00. It's worth it.
Those comes with the front pipe, both (Bank1-2) cost about $ 1,700.00 and 3-4 hours of labor (could be more if fasteners are corroded)
Incorrect cat. converter and restricted exhaust flow could cause this. I assume the air filter is clean. Dirty or bad MAF sensor could also cause high HC.
Need to remove fuses each by each and check the consumption of the circuits - see which drains higher than normal amps. When you have the faulty circuit at the fuse, you need to test the individual components on that circuit. Better to have a wiring diagram - otherwise it will be a difficult process.