Hood Lock/Latch Bolt Specs

**promet** · 01-04-2023 08:02 PM

some bold pirate who had this car before me affixed the hood lock/latch with some type of non-standard bolts. my mechanic promptly stripped these while trying to get them out.

so, i guess before they tap out, or otherwise, get the old part out they would like to see if we could figure out what the proper replacement bolts are. does anyone know the oem specs of the two prominent bolts that secure the lock/latch to the body, not the lock, but * the bolts * themselves?

this is the part i'm referring to:

Lock.

Part Number: 8E0823509D

Supersession(s): 8E0-823-509-D; 8E0823509A; 8E0823509B; 8E0823509C

so there are two, now that i look at the part, maybe different bolts? weird actually...

also, more generally, is there some sort of ' bolt spec sheet ' that lists in detail all the bolts this model uses? seems the manufacturers would have one, but is it available 'publicly'? maybe it would say in a chilton's manual or something? would the dealership guys know?

anyway, just thought i'd ask, as i would like my car back, lol...

best,

**TobiqueSlang** · 01-05-2023 03:39 AM

If you've got the part number the dealership should be able to order them, They'll use your VIN# to find the right part number if you have a bunch for the same thing.

Otherwise, if you have one of the old ones you can try finding "close enough" at a hardware store.

**EuroxS4** · 01-05-2023 08:31 AM

Find a new mechanic.

**promet** · 01-05-2023 12:24 PM

Originally Posted by EuroxS4

Find a new mechanic.

Yes... considering this, but let's just say, it's complicated... lol... full credit for this suggestion though...

**john_gonzo** · 01-05-2023 01:26 PM

In image below, 16 is the latch you mentioned (8E0823509D).

The bolts, 18, are M6x25mm, qty 4. Source: https://audi.7zap.com/en/usa/audi+a4.../8/823-823010/

**promet** · 01-05-2023 01:46 PM

Originally Posted by john_gonzo

In image below, 16 is the latch you mentioned (8E0823509D).

The bolts, 18, are M6x25mm, qty 4. Source: https://audi.7zap.com/en/usa/audi+a4.../8/823-823010/

thanks very much John, that is much appreciated.

looks to be:

part #N90955801

" Bolt that secures the Hood Latch. CONVERTIBLE. Deck Lid Latch Bolt. Front. AND switch. Deck Lid. Hood. "

**Puddin Tane** · 01-05-2023 02:39 PM

Probably M6 x 1 x 25mm, going by the head size (13mm) and depth of the latch mechanism at its mounting points. Even Lowes etc. and most auto parts stores should have this fastener.

HOWEVER (Beethoven's 5th opens)...

There is something very strange going on with these threaded holes. It's like they have threaded inserts in them such that if you turn the bolt tentatively, a la a ratchet or wrench, the insert just freewheels inside that hole, so the bolt doesn't back out (or tighten). But if you use an impact driver or "whip" the ratchet over fast, the bolt does turn faster than the insert and progress is made. So maybe your bolts aren't stripped, just need to be run in and out with an 18V cordless impact driver like they were at the assembly plant.

This oddness made me not want to pull the bolt to measure it properly. That's why I'm guessing the size.

**promet** · 01-05-2023 03:06 PM

Originally Posted by Puddin Tane

Probably M6 x 1 x 25mm, going by the head size (13mm) and depth of the latch mechanism at its mounting points. Even Lowes etc. and most auto parts stores should have this fastener.

HOWEVER (Beethoven's 5th opens)...

There is something very strange going on with these threaded holes. It's like they have threaded inserts in them such that if you turn the bolt tentatively, a la a ratchet or wrench, the insert just freewheels inside that hole, so the bolt doesn't back out (or tighten). But if you use an impact driver or "whip" the ratchet over fast, the bolt does turn faster than the insert and progress is made. So maybe your bolts aren't stripped, just need to be run in and out with an 18V cordless impact driver like they were at the assembly plant.

This oddness made me not want to pull the bolt to measure it properly. That's why I'm guessing the size.

thanks very much for that. yeah audi spares no " quirkiness " whatsoever the more i dig around on this car, the primary question i ask myself is " why "? lol...

i called the dealership and gave the guy my vin#, he says they are " M6-1.25 x 25mm ", which is, apparently, some boutique audi threading, that is quite hard to find, around here anyways, i had to order some from the audi dealership in tulsa, which in true ridiculous fashion, are going to be shipped from their warehouse in dallas, past my town, up to tulsa, and then shipped back south to me, lol... smh...

**shurur9** · 01-05-2023 03:31 PM

You can get those bolts on amazon.
Flat Allen head, button head, hex head or whatever you want....
boutique my eye.

Also Ace Hardware..Fastenal...Grainger..the list goes on and on.

**promet** · 01-05-2023 03:36 PM

Originally Posted by shurur9

You can get those bolts on amazon.
Flat Allen head, button head, hex head or whatever you want....
boutique my eye.

Also Ace Hardware..Fastenal...Grainger..the list goes on and on.

i searched pretty thoroughly, but could not find them, amazon, mcmaster-carr, etc... perhaps you would be gracious enough to share a link?

**shurur9** · 01-05-2023 03:49 PM

Sure what is the head of this bolt and how much does it matter to you?

There is nothing that says you have to have the exact drive head, unless there are clearance issues.

A different headed bolt is not a hack imo.

Example: driveshaft-axle bolts don't have to be triple square bolts. You can use Allen head bolts and often aftermarket driveshafts supply just that.

Example: I just replaced my rear seat latches and ditched the oem mild steel torx bolts (that strip) with SS button head Allen bolts.

Don't believe the hype.

Also, a star washer will keep a bolt from spinning on you.

I think your mechanic has got you on a goose chase.

**promet** · 01-05-2023 04:06 PM

Originally Posted by shurur9

Sure what is the head of this bolt and how much does it matter to you?

There is nothing that says you have to have the exact drive head, unless there are clearance issues.

A different headed bolt is not a hack imo.

Example: driveshaft-axle bolts don't have to be triple square bolts. You can use Allen head bolts and often aftermarket driveshafts supply just that.

Example: I just replaced my rear seat latches and ditched the oem mild steel torx bolts (that strip) with SS button head Allen bolts.

Don't believe the hype.

Also, a star washer will keep a bolt from spinning on you.

I think your mechanic has got you on a goose chase.

i'm not really concerned about the head... but just the M6 with specifically the * 1.25 thread pitch *, please just an example link, any one will do...

**Puddin Tane** · 01-05-2023 07:51 PM

Originally Posted by promet

yeah audi spares no " quirkiness " whatsoever the more i dig around on this car, the primary question i ask myself is " why "? lol...

I think that's what people mean when they say "over-engineered." It's like Audi/VW has a 10 inch throbber for complication for its own sake. Quite often the engineering is enchanting. Other times, uh...

So is it 1.5 thread pitch or 1.25? You dropped both numbers. On an M6 bolt 1.5 pitch would be odd indeed. That would make the root diameter less than 4 mm. Snap!

**promet** · 01-05-2023 08:02 PM

Originally Posted by Puddin Tane

I think that's what people mean when they say "over-engineered." It's like Audi/VW has a 10 inch throbber for complication for its own sake. Quite often the engineering is enchanting. Other times, uh...

So is it 1.5 thread pitch or 1.25? You dropped both numbers. On an M6 bolt 1.5 pitch would be odd indeed. That would make the root diameter less than 4 mm. Snap!

the audi guy says it is most likely 1.25, but could also possibly be 1.5. once i found the actual part# though ( thanks again @john_gonzo ), i simply ordered them and, consequently, don't actually know which thread pitch they are ( this wasn't mentioned on the dealership's purchase page )... and if that does mean ' snap! ', at least we'll know it was a ' snap ' carefully engineered by the gnomes at audi... lol...