How do you replace a petrol fuel pump on a bmw 320i coupe model 2003

what fuel?, gas or diesel, LPG, LNG, e100 what?
(E81/E82/E87/E88; ? aka E8x says
"the four-cylinder turbo-diesel, four-cylinder naturally aspirated petrol, six-cylinder naturally aspirated petrol and six-cylinder turbocharged petrol (the latter only available on coup? and convertible models)."
I can not guess engines !, if not told straight up."
what does 1116i mean., google returns zip, a typo or bounced a key? YES !
or post the country and VIN and we tell you what is under the hood
and is first, step.
let we wild guess it burns GASoline (petrol)
and has spark (sure does) and spark is dead
DIY.
all fuses good
and next we scan the car at the OBD1 scan port USA, 16pins.
it then tells my why spark is dead.
and why spray test fuel fails. a standard easy test, for prove spark and engine are ok for 100 years, the same exact test.

your engine is here. find it and tell it for 10x more exact answers for free.

https://en.wikipedia.org/wiki/List_of_BMW_engines


OK googling me like crazy car really is
Series 1.6 116i just 2 ones. no three.
I guess this is a BMW test day?
best I can tell that is an E87 BMW,actual
E87 1 Series 5 door 116i has a naturally-aspirated Inline 4 cylinder engine, Petrol motor. 1596 cm3 (1.6l)
This engine produces a maximum power of 115 PS (113 bhp - 85 kW) at 6000 rpm and a maximum torque of 150 Nm (110 lb.ft) at 4300 rpm.

So if E87 it is then it has spark and no fuel ever burns lacking spark
and must be scanned, after all fuses test good
here is the best test (EFI ways) DYI
1: connect scan tool & key on make sure scan tool works.!!!
2 CRANK FOR 5 SECONDS, AND RELEASE KEY
3: DO NOT TURN KEY OFF NOW.
4: SCAN AGAIN SEE WHY ECU TELLS YOU WHY SPARK IS DEAD,
IT SURE WILL, DTC P-3XX , HARD HARD ERRORS. LIKE THESE.
CPM DEAD.
CKP DEAD
SPARK DEAD.
FUSES DEAD
BATTERY WEAK.
AND MORE, NOT SCANNING IS THE PROBLEM
YOU CAN NOT FIX MODERN CARS LACKING THE TOOL SO RENT ONE/?

MY GUESS THIS IS THE CAR

https://www.ultimatespecs.com/car-specs/BMW/4921/BMW-E87-1-Series-5-door-116i.html

Have you replace the fuel pump relay?

General advice:
Radio interference.
Ceck alternator recharge rate.
Very low on details,u mean if in a parking lot it will iddle fine?If breaking hard won't stall?If easy break engage won't cut?
Fuel/Fuel line/fuel pump related issues.
Air mass (MAF) sensor related.
U must track the problem,more details.
Cheers,share if figured out.

Did you check the fuel pump and fuel filter? It could be that the fuel pump is bad or the fuel filter is clogged.

You must get the electronic engine control module scanned, when this light is turned on a fault code is stored in the control modules memory.

What about the fuel pump?

PETROL LIGHT ON MEAN EITHER FUEL GETTING LOW OR FUEL LINES COULD BE STOPPED UP.

It could be the fuel pump or the pump relay or fuse. It could be the fuel filter or the gas lines. If they all check out, it may be the fuel injectors. Start with the pump and make sure gas goes to the filter, through the filter, to the injectors. You'll find your problem.

Hi the clutch slave cylinder on the gear box could be damaged dew to age and standing non operation for long period. A flush and bleed could help but the slave in most times is damaged


Gavin
KDWORKS Auto & Panel Shop
Midrand Gauteng
South Africa

Bmw Specialist