325xi - car will not start. Makes a clicking sound when I put the key in not sure if starter or not enough battery power. I tried to jump start it but it still did not turn on.

Clicking when trying to crank can have a number of possible issues. From most likely to least likely they are:

1. Weak battery. Cold fall weather often is the downfall of many older batteries. Try a jump start. If the car kicks over with a boost, it most likely needs a new battery.

2. Loose or corroded battery connections. This causes lack of current to get to the starter. Remove corrosion and tighten all connections.

3. Bad starter. Like anything else, they die eventually.

If it makes a rapid clicking sound when you turn the key, then the battery does not have enough power to turn the starter, fit new battery, after fitting battery start car and check alternator is charging properly, let me know how it goes

the alternator isn't charging battery that would account for loss of power and also clicking when try to start , try a jump start if it starts then you know its the battery so with engine running check the alternator charge rate with a voltmeter across the battery terminals anything below 13 volts then check the alternator belt is tight enough , good condition etc , then recheck charge rate if still low fit new alternator

You may need starter:

the clicking that you hear is coming from the starter relay. sounds like your ignition starter switch or ignition lock cylinder is bad.

Hi there:It sure sounds like a dead or weak battery or problem with connections at battery or starter contacts. Check all connections and make sure there is no corrosion built up at battery terminals. Charge battery or try jumping.
If even dont work, check starter, starter solenoid or ignition switch.
Hope this helps.

if it is just making a ' clicking ' sound - then this is ususlly a sign that the battery is bad and does not have the Amps to engage the starter. the clicking sound that you hear is the starter solenoid.
replace your battery with a new one ( car batteries really are only good for 4 to 5 years ) -- and when you change the battery, check to make sure your alternator is also putting out the proper voltage to charge the system,, ( most battery test/supply shops will do this for free to make sure everything is fine ).
NOW -- if your battery is good (?) - then the problem is the starter solenoid itself and it will need to be replaced. the starter and the solenoid are sold as a complete unit.
to get your car to the battery shop -- just jump start the vehicle using another vehicle. ( NOTE: when attaching the cables to the battery - make sure your keys are out of the ignition, as the 'SPIKE' sometimes can harm sensitive computer units in the car,, after about 2 minutes of attaching the cables - then put your keys in the ignition and start the car. ).

c...

try the starter solenoid or the starter relay....be sure all the starter/ignition fuses are good

Just to make sure your battery is good, you should try to jump start the car, or try a different known-good battery.

if when you jump it starts its your batt if if keeps dying it your alternator the clicking sound is your statrer which means thats good try the batt when you buy a new one it will have a warranty soo if it dies because the alt you will get a new one batt for free (the alt charges the batt)