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Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD

Hello everyone,

Hope you light the light..

I got my Audi A3 in April 2022, the guy before was driving 80miles/day 4-5x/week.

Since I bought it it was ok. I don't drive long miles, locally, short trips around.

And one day it didn't start. The guy helped me with battery boost starter. Which took few times to start the car, after 5 -6 times the car started.

Then it was ok for a few days. It easy starts with jump leads, but with battery boost leads takes few min, few times to crank the car.

* When it's not starting the engine cranking, but no start. Jump leads, no problem.

* I found bad cigarette lighter fuse. Changed it. The next 2 weeks or so it was perfect, no issues with starting.

* Couple weeks ago it was messing again. Had to use battery boost couple of times, but then it couldn't help, the booster loosed it power, low battery. Engine keep cranking, but no starting. Next door neighbor helped me with jump leads, straight forward engine starts.

* Since then the car starts from first time, no issues. .. so far...

I went to garage to inspect, they say cannot help when there is no problem, the car works fine..

* No noisy starter motor

* Oh yes! I hear noise sometimes in the dash, like cables shortening.

* Have to change number plate light, i dont think it could cause anything.. or might://

I guess that's it...

Thank you

Edited by ArvyD on 15/08/2022 at 11:43

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - elekie&a/c doctor
Sounds like your battery is in trouble.
Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD

Hi, thank you for reply.

I forgot to mention, i went to Halfords last week to test the battery and alternator. According to them battery and alternator are good. Lots of life in the battery.. ://

Yesterday, 15 August 22:

12.00am: car doesn't start. My battery boost didn't help. Jump leads with other car didn't work.

Around 2pm same day: I tapped with steel bit on the starter motor. The car started immediately! Got back home. After few hours car doesn't start. Tapped starter motor again, car doesn't start.

Today morning, 16 August 22:

Didn't try to start the car, went straight to test the battery with the multimeter: 12.51V

Battery testing after 5 min lights on - 12.50

20 min later tried to start the car - started with no problem.

10 min later, cars starts perfectly again.

Car starts immediately without banging the motor starter.

Any ideas..?

Thanks

Edited by ArvyD on 16/08/2022 at 07:58

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - RT

Suspect the starter solenoid is sticking - tapping the end may release it temporarily - cure is a replacement starter motor.

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD

Suspect the starter solenoid is sticking - tapping the end may release it temporarily - cure is a replacement starter motor.

Thank you RT,

Would you go with used one or new one..?

I found this one on eBay, low mileage, good brand.

Thank you

www.ebay.co.uk/itm/154364988708?mkcid=16&mkevt...S

Edited by ArvyD on 16/08/2022 at 10:04

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - Cris_on_the_gas

So about a 1/3 of the price of a new one. A personal choice. Looks like it was tested and has a 90 day warranty so maybe worth a punt.

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD

Hi Cris_on_the_gas,

That's what I thought...

Thank you

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - elekie&a/c doctor
I’ve seen these with fractured wiring at the starter motor. May be something worth investigating.
Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD

Thank you elekie&a/c doctor, will go to check!

Edited by ArvyD on 16/08/2022 at 10:02

Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - elekie&a/c doctor
You haven’t actually established what’s wrong with the car , so I’d be reluctant to spend out on something it doesn’t necessarily need .
Audi A3, 1.6l, 2010 - Audi A3 doesn't start sometimes - ArvyD
You haven’t actually established what’s wrong with the car , so I’d be reluctant to spend out on something it doesn’t necessarily need .

Thank you elekie&a/c doctor,

Disconnected battery neg terminal, checked the cables Cleaned cables around, connections, sprayed with electric cleaner, sanded even if it looked clean. I'll see how it goes.. I bought that part in case it goes wrong so i have a part to compare performance..

Tx