Where is the wiper relay on a 98 bmw 540i - X5 Series BMW Cars & Trucks

the output speed sensor is located on the top of the drive extention housing. See:
https://www.realoem.com/bmw/enUS/showparts?id=DD63-USA-04-1998-E39-BMW-528i&diagId=24_1882
item 4

First, I'm not a BMW mechanic.
* How about this; https://www.amazon.com/Standard-Motor-Products-RY-777-Starter/dp/B006DX9EIW/ref=sr_1_1?ie=UTF8&qid=1530601973&sr=8-1&keywords=1997+bmw+540i+starter+relay
* be sure to plug in your car brand, model, and year for Amazon to check if it will work.
Aloha, ukeboy57

check the fault code. It may have nothing to do with the battery failure. Once you have the code, an informed answer will be forthcoming.

The average cost for a Catalytic Converter Replacement is between $552 and $1097. Labor costs are estimated between $196 and $248 while parts are priced between $356 and $849.Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
some good after market cats can be had for less then half the prices stated above. press the helpful button
http://www.autopartswarehouse.com/shop_years/bmw-540i-catalytic-converter-1997.html

540i Catalytic Converter options

1997 BMW 540I 4 4L V8 Catalytic Converter RockAuto

BMW 740IL Catalytic Converters

Here's a link to your fuel pump relay. BMW E39 Fuel pump relay locations Tech Bentley Publishers Support

don't know about the relay, it uses a resistor pack, two of them, one hidden the console and the other at the fan itself. There is a good you-tube video on the resistor pack replacement that is the console location. It's tricky, but it faily often.

broken wire between relay and pump

This is what your starter will look like. It's usually on the passanger side engine. Follow your red battery cable to the relay, then follow it from there until it reaches the starter. Make sure you remove the red cable from your battery before working on it.

i have came across this problem before.timing out by one tooth on timing gears; get it checked out.hope this helps yo.adrian

You must check to see if you have power at the fuel pump relay which is probable in a fuse box under the hood.