Every new starter will be smaller than the Bosch item, they have all gotten much smaller over the years. It will still crank faster than the old Bosch did.
Sounds like you just need a new starter. Best advice I can give you is to buy a new starter from a reputable brand, like Bosch.
I would guess starter if there’s no sound when turning the key. Just replaced one on a Ford Focus and it sprang to life.
Just had exactly the same problem on my '09, needs a starter. Well more accurately the solenoid that pushes and pulls the starter teeth onto the flywheel is underperforming, and when cold it doesn't get off the flywheel fast enough to keep from barking the starter motor against the faster spinning flywheel.
I bought a Bosch Reman for about $260 with a 5 year warranty, went in with a moderate amount of persuasion. The oil filter, dipstick, oil pressure sensor have to come out to do it. You being from Chicago might have to fight to get the dipstick holder out without breaking it.
I used to have a Bosch starter. Rock solid even well below freezing. Solenoid broke. My current starter is whatever generic garbage they put in, and it doesn’t catch the first time I start it in sub-20F weather.
With a bit of searching, you can find more information about this starter swap. I would get the newer starter. There are so many benefits of the newer starter vs putting in the old and heavy starter that the factory used. Use SR0407X [Bosch number]/09A 911 023BX. You also can use the SR0424X/020 911 023FX but it's not as powerful. The SR0407X starter is for the diesel and has about 2hp to crank over your engine. This is way more power than you will ever need. That starter also is smaller and uses a planetary gear system so it will spin the engine at a faster RPM.
It killed what is left of my soul but I mickey moused it. All the starters that match at the parts stores (bosch, ac delco etc) lack the correct plug. Used a couple ugly .250" flat connectors. how embarassing.
Again this is a brand new starter actually it's a rebuilt starter which is Bosch OEM. When I did remove the old starter and put in this new rebuilt Bosch OEM starter the car started right up. The next day I went out to start it and all I got was one loud "CLICK"!
i bought a britpart 2,25 starter as it was oem. The starter was branded Bosch but it lasted a week and it drew 600A and turned over slow.
So I sent it on a nice Bosch one. That lasted 3 months and just failed today.
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