[Asianpride96]

Hi I have a 2009 bmw 335xi coupe. I literally replaced every components that will get this car up and going perfectly. I had to replace the alternator and the starter because all of it was super old and bad condition. Then I went and replace the battery too, so the car should be cranking right up perfectly. But when I tried to crank it, it wouldn't crank. All of the power and lights come on but it wouldn't crank. It would just go into accessory mode. Also when I step down onto the brake pedal it wouldn't really go down. It was like super firm and felt like as if something was putting pressure on it.

Could it be a blown fuse? If this happened to anyone of you guys can you please tell me how to fix it. I really don't want to tow my car to the dealership if I can absolutely avoid it.

[Suvorovo]

What codes are you getting if any?

[Amber24019]

Would love to hear what you got going on. Having a no start issue myself.

[anjuna]

brake pedal sensor - easy to verify. Have someone look at your tails when you depress the brake pedal and/or record it.

You can code around this requirement, but for safety, I can't suggest it (even though I've done it).

No brake lights - replace sensor
Brake lights - code around it and see then.

Also, the pedal will be hard, as the engine is not pulling vacuum to help out with the brake booster.

[Asianpride96]

Originally Posted by Suvorovo

What codes are you getting if any?

No code beside the 4x4 symbol

[Asianpride96]

Originally Posted by Amber24019

Would love to hear what you got going on. Having a no start issue myself.

I haven't solved this problem yet

[Asianpride96]

Originally Posted by anjuna

brake pedal sensor - easy to verify. Have someone look at your tails when you depress the brake pedal and/or record it.

You can code around this requirement, but for safety, I can't suggest it (even though I've done it).

No brake lights - replace sensor
Brake lights - code around it and see then.

Also, the pedal will be hard, as the engine is not pulling vacuum to help out with the brake booster.

Hmm so if I replace the brake sensor it might fix it? I'll try braking to see if the tail lights shows up or not. But the brake pedal is def stiff like a mf though. What cause it to not get vacuum from the booster?

[bmwbob89]

The engine has to be running for the brakes to get vacuum to the booster. If the brake lights work the switch should be okay.

[DoJu3]

Ground strap will kill the engine while everything else has power.

[Asianpride96]

Originally Posted by bmwbob89

The engine has to be running for the brakes to get vacuum to the booster. If the brake lights work the switch should be okay.

Okay gotcha, is there a diy on how to fix that?

[Asianpride96]

Originally Posted by DoJu3

Ground strap will kill the engine while everything else has power.

Which ground strap are we talking about?

[Franklinfatulo]

i had this problem before it was my clutch pedal sensor, i was working under there and somehow it got disconected, idk if automatics have something similar but id check down there, also ground strap is on driver side underneath the car, good luck

[B58daworld]

I'd start with ground strap. Take your jumpers and connect anywhere on engine and anywhere on the body. Just metal to metal connection, and try to start it. Ground strap is located on drivers side by engine mount. It's super common

[Asianpride96]

Originally Posted by B58daworld

I'd start with ground strap. Take your jumpers and connect anywhere on engine and anywhere on the body. Just metal to metal connection, and try to start it. Ground strap is located on drivers side by engine mount. It's super common

Sorry for the late reply. But that sound like it could be the cooperate. I'll definitely check that one out and see. Thanks!

[Asianpride96]

Originally Posted by B58daworld

I'd start with ground strap. Take your jumpers and connect anywhere on engine and anywhere on the body. Just metal to metal connection, and try to start it. Ground strap is located on drivers side by engine mount. It's super common

Hi so I replaced the ground strap and it still didn't crank. Idk why though. Is there anyway for me to post a video on here for you guys to see or hear what the problem is?