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Discussion Starter · #1 ·
Noticed oil on ground and reached under the front end this morning and found some oil on edge of the plastic "shield" about an arm's length away from front. Haven't popped the hood yet, but wondering if I'll be able to see anything from that angle anyway. Anything I should look for? 2016 Grand Touring with 79k miles. I bought it earlier this year, and haven't even driven it much due to Covid. Thanks!
 

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if a visual inspection is inconclusive - a good way to determine where the oil leak is coming from is to use some UV oil dye and a UV light source to spot the leak (ie, UV flashlight). You can shop around for better prices but usually auto parts stores should have them.

first try to determine if it's engine oil, power steering, transmission, etc.

Add a little bit of UV dye to the suspect system and operate the engine to working temperature. Usually that's enough to produce some result. If not then you have a very small leak and may require longer cycle to see result. Have patience and do one system at a time. Probably start with engine oil since that is more common
 

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Noticed oil on ground and reached under the front end this morning and found some oil on edge of the plastic "shield" about an arm's length away from front. Haven't popped the hood yet, but wondering if I'll be able to see anything from that angle anyway. Anything I should look for? 2016 Grand Touring with 79k miles. I bought it earlier this year, and haven't even driven it much due to Covid. Thanks!
Congratulations on the new driveway ornament... :rolleyes:

Brown oil is engine, red or blue oil is other (transmission, power steering). I usually tell by smell.

I bet your oil filter is not fully tight.
 

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There is no power steering; these cars are electric PS boost. It's either oil or transmission; put the front on ramps, remove the belly pan (not hard) and it should be rather obvious where it's coming from.

You need to find it and fix it; by the time you're actually able to see a leak with a belly-skirted vehicle on the ground it's not leaking a little -- it's leaking a lot or over a long period of time and that can turn into big trouble real fast, especially if it's transmission fluid as that's not easily checked (unlike engine oil.)

Easiest is that whoever did the last oil change buggered the job and it's leaking either from the drain plug or oil filter. Note that with the drain plug if you do not have a Fumoto valve on the car the washer is NOT reusable; it's an aluminum crush washer and if you re-use it it WILL leak.
 

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There is no power steering; these cars are electric PS boost. It's either oil or transmission; put the front on ramps, remove the belly pan (not hard) and it should be rather obvious where it's coming from.

You need to find it and fix it; by the time you're actually able to see a leak with a belly-skirted vehicle on the ground it's not leaking a little -- it's leaking a lot or over a long period of time and that can turn into big trouble real fast, especially if it's transmission fluid as that's not easily checked (unlike engine oil.)

Easiest is that whoever did the last oil change buggered the job and it's leaking either from the drain plug or oil filter. Note that with the drain plug if you do not have a Fumoto valve on the car the washer is NOT reusable; it's an aluminum crush washer and if you re-use it it WILL leak.
Exactly what he said. No power steering in the 3rd gen, so that's not it. The washers for the oil drain plug should never be re-used and (hopefully) is the source of your issue.
 

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it depends on what year 3rd gen. Earlier 3rd gen (ie; 2012-13) still uses hydraulic power steering


I overlooked that he has the 2016 model.



wait when does 3rd gen starts? 2014?

edit: I am so surprise Talon hasn't chimed in. He has a real hard-on for me 🤡
 

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it depends on what year 3rd gen. Earlier 3rd gen (ie; 2012-13) still uses hydraulic power steering

I overlooked that he has the 2016 model.




edit: I am so surprise Talon hasn't chimed in. He has a real hard-on for me 🤡
All 3rd gens (model year 2014+, build date 2012+) have full electronic steering :)

Talon is just bored because he hasn't gotten in any arguments lately XD
 

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yes. you are right. 2014+ for 3rd gen. hahaha

it wasn't sold until 2014 model year but was introduced in 2012.. that's where i mixed it up. lol
 

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yes. you are right. 2014+ for 3rd gen. hahaha

it wasn't sold until 2014 model year but was introduced in 2012.. that's where i mixed it up. lol
Yeah, stupid marketing gimmicks. The 3rd gen starts with "2014" but you were able to purchase a "2014" as early as December of 2012 in North America.

But back on subject here, OP let us know what you find out when you take a peek under the car!
 

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One thing to check is the oil pressure switch. It’s located above the oil filter.

I had to replace mine recently. It developed a bad leak between the sensors metal base and the plastic body.
 

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There is no power steering; these cars are electric PS boost. It's either oil or transmission; put the front on ramps, remove the belly pan (not hard) and it should be rather obvious where it's coming from.

You need to find it and fix it; by the time you're actually able to see a leak with a belly-skirted vehicle on the ground it's not leaking a little -- it's leaking a lot or over a long period of time and that can turn into big trouble real fast, especially if it's transmission fluid as that's not easily checked (unlike engine oil.)

Easiest is that whoever did the last oil change buggered the job and it's leaking either from the drain plug or oil filter. Note that with the drain plug if you do not have a Fumoto valve on the car the washer is NOT reusable; it's an aluminum crush washer and if you re-use it it WILL leak.
oops, I thought I was responding to a Mk1 thread and totally missed the date part. My bad.
 

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Just fixed a similar leak this morning. Never had replaced the washer on the drain plug when changing the oil. Saw a few spots after the last oil change. Replaced the plug and washer, everything good now.
Mike
 

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Discussion Starter · #13 ·
Had to take the Mazda in for oil change and tire rotation, asked them to check for leak. They sent a video https://tvidnow.com/0BLKZCM They say there is denting and I need to replace my oil pan. I don't see any denting on the video, and it looks like the leak is coming from the plug. I'll watch it after the oil change and see if it keeps leaking. If it does, next time I'll pick up a new plug and washer beforehand. Thanks all!
 

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Denting? It would be basically impossible to dent the pan by some impact without destroying the plastic undercarriage shield.
 

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Had to take the Mazda in for oil change and tire rotation, asked them to check for leak. They sent a video https://tvidnow.com/0BLKZCM They say there is denting and I need to replace my oil pan. I don't see any denting on the video, and it looks like the leak is coming from the plug. I'll watch it after the oil change and see if it keeps leaking. If it does, next time I'll pick up a new plug and washer beforehand. Thanks all!
That's literally how the pan is designed with those indents lol, to me that just looks like they forgot to either tighten the drain plug or filter or they over tightened it. Or again they didn't change the washer on the drain plug. like ticker said that plastic undershield would have to be destroyed to dent the pan that bad.
 

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Discussion Starter · #16 ·
Thinking about calling the dealership over this, I'm not positive they even rotated my wheels. I found this post which shows a plug in a 2014 6 that uses an Allen wrench, is this what came on the 2016 models? Mine doesn't have that. FYI, only reason I'm taking it to this dealer and not changing it myself is that I bought this car used and there is an included warranty that requires servicing with a specific dealer.
 

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Thinking about calling the dealership over this, I'm not positive they even rotated my wheels. I found this post which shows a plug in a 2014 6 that uses an Allen wrench, is this what came on the 2016 models? Mine doesn't have that. FYI, only reason I'm taking it to this dealer and not changing it myself is that I bought this car used and there is an included warranty that requires servicing with a specific dealer.
Some of the earlier models got that hex head drain plug but dimension wise it's identical to the regular bolt looking drain plugs, honestly whenever i get one of those drain plugs here at the dealer I swap it out for a regular one.
 

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Thinking about calling the dealership over this, I'm not positive they even rotated my wheels. I found this post which shows a plug in a 2014 6 that uses an Allen wrench, is this what came on the 2016 models? Mine doesn't have that. FYI, only reason I'm taking it to this dealer and not changing it myself is that I bought this car used and there is an included warranty that requires servicing with a specific dealer.
My 2017 has the allen head drain plug like shown in the picture.

In the shop's video the drain plug with the standard hex head was most likely swapped in because the original recessed drain plug was stripped out. This is easy to do after a few oil changes if you're not being careful.

There's no clear evidence in the video that the oil pan is dented, or the exact source of the leak. Personally I think it looks like a leaky drain plug gasket. I would ask if they can provide clear pictures of the alleged dent and specific source of the leak. If there's no witness marks on the belly pan, they probably aren't being honest.

At the end of the video he says he's with a Kia dealership, so they might not be familiar with Mazdas and could be mistaking the normal shape of the oil pan for dents.

I also noticed a white oil filter installed - not the normal color of the black Mazda OE oil filter.
 

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Discussion Starter · #19 ·
I've been trying to get ahold of a manager in the service department with no luck so far, but I'll keep trying. So far, since the oil change, I don't think it has leaked. I'm taking it to that dealership because I bought my car from a used car dealership who has a deal with this dealership for warranty work. My warranty continues as long as maintenance is performed there.
 
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