Key wont start first go?

menty · Wed, May-22-2019, 04:29:13 AM

I have always had an issue with my key where sometimes it starts first go, but other times it will take 2 goes to start the car.

Do your keys always start the car first go?

Today, it took me 6 goes to start the car. My spare key has never been able to start the car.

I think its an EWS problem. Is it easy to just do an EWS delete, or can I recode/sync my second key?

Drewster · Wed, May-22-2019, 01:28:30 PM

My first thought was actually the starter going out

Steve M3 · Wed, May-22-2019, 02:41:38 PM

When it won't start, does it keep turning over or does it start up and immediately die? EWS issues typically let the car start, but instantly kills the engine.

I agree that it sounds like a possible starter issue, but more info is needed.

11b4 · Wed, May-22-2019, 02:50:21 PM

Scan the car and see if there's a ews code, or watch live data of ews when turning the car on. Most likely the starter solenoid going out

Sent from my SM-G935V using Tapatalk

aznniche · Wed, May-22-2019, 03:23:52 PM

Weak battery could also be the cause.

EYEHAVEYOU · Wed, May-22-2019, 05:44:48 PM

Quote:

Originally Posted by Drewster

My first thought was actually the starter going out

This was my recent issue, same symptoms, although it got progressively worse where sometimes I just couldn't get it to start.

Apparently clutch switch module can also be the culprit, I replaced that first since it was easier.

Cbouts · Wed, May-22-2019, 06:45:31 PM

I have the same issue... Put in a new battery and made no difference.

first turn, engine cranks but just never starts. take the key out and put it back in, starts right up. like clock work...

BMW thinks it's the ignition switch but wasn't sure and i'm not ready to spend $450 to "find out". rather just turn the key twice.

sapote · Wed, May-22-2019, 07:38:38 PM

Quote:

Originally Posted by menty

Do your keys always start the car first go?

It can be more helpful and clearer to use cranking and engine fired up in this case.

sapote · Wed, May-22-2019, 07:41:01 PM

Quote:

Originally Posted by Steve M3

EWS issues typically let the car start, but instantly kills the engine.

I can't see this logic. The EWS module detected the key ID then passed this information to the DME, so what made it changed its mind after sending OK message?

Braymond141 · Wed, May-22-2019, 07:41:56 PM

EWS issue is no crank. The chip in the key either becomes weak or moves so the EWS blocks starting. You can watch it with INPA.

The crank no start seems to be common and someone had a fix for it but I can’t recall what it was. iirc it was something fuel related.

Wed, May-22-2019, 04:29:13 AM	#1
menty Registered User Join Date: May 2014 Posts: 142 Reputation: 0 Location: Sydney	Key wont start first go? I have always had an issue with my key where sometimes it starts first go, but other times it will take 2 goes to start the car. Do your keys always start the car first go? Today, it took me 6 goes to start the car. My spare key has never been able to start the car. I think its an EWS problem. Is it easy to just do an EWS delete, or can I recode/sync my second key?

Wed, May-22-2019, 01:28:30 PM	#2
Drewster Registered User Join Date: Aug 2014 Posts: 3,689 In the garage: '03 BMW M3 E46 Reputation: 0	Re: Key wont start first go? My first thought was actually the starter going out

Wed, May-22-2019, 02:41:38 PM	#3
Steve M3 Registered User Join Date: Feb 2013 Posts: 2,133 Reputation: 0 Location: Houston	Re: Key wont start first go? When it won't start, does it keep turning over or does it start up and immediately die? EWS issues typically let the car start, but instantly kills the engine. I agree that it sounds like a possible starter issue, but more info is needed.

Wed, May-22-2019, 02:50:21 PM	#4
11b4 Registered User Join Date: Jan 2016 Posts: 1,062 Reputation: 0	Re: Key wont start first go? Scan the car and see if there's a ews code, or watch live data of ews when turning the car on. Most likely the starter solenoid going out Sent from my SM-G935V using Tapatalk

Wed, May-22-2019, 03:23:52 PM	#5
aznniche Registered User Join Date: Feb 2006 Posts: 1,082 In the garage: '04 BMW ///M3 Reputation: 0 Location: Grand Prairie	Re: Key wont start first go? Weak battery could also be the cause.

Wed, May-22-2019, 06:45:31 PM	#7
Cbouts Registered User Join Date: Feb 2012 Posts: 36 In the garage: '17 AUDI A4 '17 BMW 330xi '10 AUDI A4 '02 BMW ///M3 Reputation: 0 Location: Lancaster	Re: Key wont start first go? I have the same issue... Put in a new battery and made no difference. first turn, engine cranks but just never starts. take the key out and put it back in, starts right up. like clock work... BMW thinks it's the ignition switch but wasn't sure and i'm not ready to spend $450 to "find out". rather just turn the key twice. __________________ ————————— 02 M3 - Silver 6 Speed Coupe - weekend warrior 17 Audi A4 - Ibis White - Daily 10 Audi A4 - Black 6 Speed - “work truck” - Traded Last edited by Cbouts; Thu, May-23-2019 at 11:45:20 AM.

Wed, May-22-2019, 07:41:56 PM	#10
Braymond141 Registered User Join Date: Aug 2005 Posts: 21,109 In the garage: '96 BMW M3 Coupe '97 BMW M3 Sedan '98 BMW M3 Sedan '03 BMW 325xi Touring '12 BMW X5 35d Reputation: 0 Location: Oakhurst, CA	Re: Key wont start first go? EWS issue is no crank. The chip in the key either becomes weak or moves so the EWS blocks starting. You can watch it with INPA. The crank no start seems to be common and someone had a fix for it but I can’t recall what it was. iirc it was something fuel related. __________________ 1996 M3 Journal \| 1998 M3 Journal \| MSportParts \| @Braymond141

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