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  1. 2014 Mazda 3 (2.5L): Oil leak near water pump

    2014-2018 Mazda 3 Skyactiv Discussion
    Hey guys, I recently discovered oil droplets forming under the water pump but can't directly see the source of the leak. Anyone know where this could be coming from? See the attached images and this video I took for reference:
  2. A/C Compressor Leak

    2010-2013 Mazda 3 Engine and Performance
    Put on a new a/c compressor last weekend, then vacuumed and recharged it to right amount of r134 on Monday. Was about to drive home when I noticed my car smelling like refrigerant. Turns out it was a bad pressure release valve. Is it possible to just replace that valve or I am going to have to...
  3. 2010 - Leak on Passenger A-Pillar (Source?)

    2010-13 Mazdaspeed 3 Appearance & Interior
    Hi! I have been dealing with an annoying leak on the passenger a-pillar for the past few months. I am hoping someone has had a similar experience and/or can help me find the source. I have a 2010 Mazda 3 Sedan. I bought it used last October and noticed the leak around December. It pools at the...
  4. Motor oil leak thru sensor?

    New Member Introduction & Forum News/Guide
    Hello: Can somebody tell what part is that next to the coil that seems to be a sensor on the valve cover I posted in a photo? A little bit of oil is leaking thru it and I want to fix it. Appreciate any help. regards, rob
  5. Leak in a almost brand new vehicle

    2014-2018 Mazda 3 Skyactiv Discussion
    Took my 2017 Mazda 3 GT 6MT to the dealership today for a standard service and they said that they spotted a oil leak on the AC compressor. I had to leave it there today for a diagnosis and they will let me know what they find later today. But I am pretty disappointed about this. I bought the...
  6. Thermostat Housing Leak?

    2004-2009 Mazda3 How-To Guides
    I noticed evidence of a leak during an oil change today. Dabbed it with my finger and, as I suspected, confirmed it is coolant. Went topside for a look and traced the wetness to the thermostat housing. The area is cramped and difficult to photograph. It appears the wetness is forming on the...
  7. Small oil leak (2014 Mazda 3ST)

    2014-2018 Mazda 3 Skyactiv Discussion
    I change the oil in my 2014 Mazda 3ST (2.5L engine, 29000 miles) in 3000 mile intervals. The plastic cover below the drain plug is always oily. I don't see oil marks on the oil filter so it makes me think that perhaps i have a small leak at the drain plug. I torque the plug to 25 ft-lbs and use...
  8. 2010 Mazda 3 Right Rear Passenger Leak *HELP PLEASE*

    Interior / Exterior
    Guys, I have a 2010 Mazda 3 2.0 Hatchback (No Sunroof) and recently i started having a Flooded Carpet (Only on my Right Rear Passenger Area). I only Get these Floods when it rains. Seats and Dry and there is no other Leaks (not even in the trunk) Can someone Help me solve this. IDK what to do...
  9. 2010 mazda 3 GT anti-freeze leak from one of the Coolant Reservoir hose

    2010-2013 Mazda 3 & Skyactiv Discussion
    Hi, today I noticed there was anti-freeze leaks on my drive way and I traced the leak to one of the hose I highlighted in red in the pictures. When I wigged the hose from left the right I saw anti-freeze spraying out near the clamp (the hose cracked near the clamp connected to the radiator). I...
  10. Rear Main Seal Leak!

    2014-2018 Mazda 3 Skyactiv Discussion
    Firstly, this story just solidifies my belief in changing one's own oil. Changing it yourself... getting on the ground and inspecting your car. This periodic inspection likely saved me a costly repair bill down the road. Here goes: I bought my 2017 Touring 2.5 hatchback (manual transmission)...
  11. Need to find the source of a coolant leak

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Hi, my mazda 3 2014 2.0 was in an accident a few years ago. The transmission cooler mount has a slight bent on the outside pipe were the hose attaches to it. This never created any problems for me other than a few drops a week. Recently my coolant leak has gotten way worse but it's not from...
  12. Oil Leak?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Ok so I have a small oil leak developing (I think). It's a plug right above the far left spark plug on my 2014 Mazda3. I don't know if this is normal or what but I don't even know what this part is. Anyone mind helping?
  13. Headliner leak onto driver and passenger seat

    2004-2009 Mazda3Appearance & Interior
    Have a 2005 3 hatchback with a retractable sun roof. When it rains heavy I get a drip into my car from underneath each sun visor and just above the panel trims (believe it's just trickling down to that area. But was wondering if anyone else had had this issue with theirs. I need to replace my...
  14. Help Identifying coolant leak

    2004-2009 Mazda3 Discussion
    I currently have coolant fluid leaking from a recessed bolt of some sort on the driver side on my cylinder head on my 2008 Mazda 3i 2.0L. I have searched and search but cant seem to find any reference to this "plug". I was thinking it was a freeze plug of sorts but it is threaded with a hex head...
  15. Oil leak on tensioner

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Does this happen to your Skyactiv units? It seems its a known issue as some of my club mates here in Philippines had this issue. Is there a TSB regarding this? Thanks.
  16. Oil Leak in Brand New 2016 SGT

    2014-2018 Mazda 3 Skyactiv Discussion
    I noticed today that I had a drop of oil on my garage floor, this is a brand new 2016 SGT with 950 miles. I am waiting for a call back from service to have a look at it. In the mean time has anybody had this problem with there mazda3. It looks like it is in the middle part of the car I guess...
  17. Filter Housing Leak

    2010-2013 Mazda 3 Engine and Performance
    Hey ya'll I wanted to know if anyone has gone through this problem yet. I've seen posts about this problem for the Mz5's but havent seen one for the 3 yet. So I noticed that my engine oil was leaking from some where. Looked around the hood to see if it was leaking from the valve covers but...
  18. New Mazda 3 roof water leak and rust

    2014-2018 Mazda 3 Skyactiv Discussion
    Hello, I bought a 2014 Mazda 3 in August brand new. I live in California and it has't rained much but yesterday I went through a car wash and noticed that the back right pilar headliner (inside the car) was discolored. I touched it and it was very damp and wet. I noticed water seeping lower...
  19. Windshield washer jet leak?

    2014-2018 Mazda 3 Skyactiv Appearance & Interior
    The past few times I've driven the car, I'll notice that randomly a few drops of windshield washer fluid spritzes from the jets onto the bottom of the windshield without me using the controls. Does anyone else experience this?
  20. Help me find this leak!

    2004-2009 Mazda3 Discussion
    Hey everyone. So my Mazda3 decided to leak an abundance of coolant last night. It is a pretty large leak that I'm thinking is external. Pictured below is a unit which bolts onto the block. I'm not sure what this thing does but it seems like it could be the culprit. The hoses which connect to it...