Author Topic: Note to new buyers of old 2's and 3's....beware underbody rust!!  (Read 4602 times)

0 Members and 1 Guest are viewing this topic.

Offline bobmax

  • TS2 Class
  • ***
  • Posts: 218
  • Gender: Male
  • Body: Hatchback
  • Colour: Deep Crystal Blue Metallic (42M)
  • Engine: 2.0L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: SE L Nav
  • Year: 2014
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #15 on: December 19, 2018, 09:16:01 AM »
interesting thread.
Thanks for the info Willpower.  ;)
Familiarity breeds contempt - and children

Offline PJW17

  • S Class
  • *
  • Posts: 3
  • Gender: Male
  • I need to update my signature strip!!!
  • Body: Hatchback
  • Colour: Black Mica (16W) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: TS2 Takuya
  • Year: 2011
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #16 on: July 24, 2020, 02:43:31 PM »
My 11 reg Takuya has just been in overnight for a new oil sump - it had corroded to the point it would flake away when picked with a fingernail. Nightmare!
2011 Mazda 3 Takuya, Mica Black

Offline Solo_run

  • TS Class
  • **
  • Posts: 29
  • I need to update my signature strip!!!
  • Body: Hatchback
  • Colour: True Red (A4A) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: Sport
  • Year: 2016
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #17 on: July 28, 2020, 10:14:54 PM »
Are these sorts of problems occuring in anything post 2015?

Offline StevenRB45

  • Ultimate Class
  • ******
  • Posts: 1133
  • Gender: Male
  • Suzuki and Fiat Refugee
  • Body: Hatchback
  • Colour: Crystal White Pearl (34K) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: TS2 Takuya
  • Year: 2011
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #18 on: July 29, 2020, 08:15:29 AM »
They are too new to say, I've seen photos of gen 3 cars in Canada with pretty bad surface corrosion but they have terrible winter conditions.

Whether you need to worry will depend on your future plans for the car...basically if you plan to still have it long beyond 10 years old then I'd probably look into getting a long term rust treatment on the underside to prolong the life of the car.

If you're trading it in after 3 years..this doesn't concern you at all.

There's a luck of the draw element as well, gentleman above with a rotten sump for example, I have literally the same car my sump is fine despite the underside corrosion elsewhere. Will say mine was MOT'd last week and had no advisories for underbody corrosion at 9 years old, does have the issues I mentioned earlier in the thread but it is in general still solid and will remain so for a decent amount of time.

Is it perfect? No but it's 9 years old, and has done 84k miles as a daily hack so it was never going to be, looks tidy enough though.
« Last Edit: July 29, 2020, 05:23:42 PM by StevenRB45 »

Offline Engineer Andy

  • Sports Class
  • ****
  • Posts: 283
  • Gender: Male
  • Smoke me a kipper - I'll be back for breakfast!
  • Body: Saloon
  • Colour: Sunlight Silver (22V) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: TS2
  • Year: 2005
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #19 on: July 29, 2020, 03:33:30 PM »
Ditto for my gen-1 car, having passed it's latest MOT in early Jan 2020 yet again with no advisories on that score (only one for a windscreen non-issue) and (touch wood) no failures since new.  Location and usage certainly play a big part...plus a good dose of luck.  Mine, on the other hand, likes to go through batteries, now changed a fortnight ago to number 4 (once every 4-5 years) due to the low annual mileage.  Easier to deal with than significant rust though.

I do remember reports of rusting on early gen-3 cars only after 6 months of it being released, though mostly from North America.  Nothing since.  Most of the serious rusting issues appear (taking out living by the sea on in areas that have regular road salting in winter and high use) to be in the first 2-3 years of production of the gen-1 car before the mid-life makeover.  Maybe mine was lucky as it was produced about 5 months before that makeover.  One older (by a year) example near me is now starting to show serious signs of corrosion of the real wheel arches.  Another, slighly newer (by about a year as well) looks to be fine.

Offline Ed-Led

  • TS2 Class
  • ***
  • Posts: 110
  • Gender: Male
  • Body: Hatchback
  • Colour: Jet Black Mica (41W)
  • Engine: 2.0L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: Sport
  • Year: 2016
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #20 on: July 29, 2020, 06:51:29 PM »
Early Noughties Mazdas were seemingly quite bad for rust. I had three Mazda 323's before moving onto a Mazda 3, the first two from the mid/late 90's didn't seem to corrode much but my last 323 from 2002 was bad. The rear wheel arches were going fairly early and by 10 years old the rot was terminal in the strut top mounts. Rusty rear wheel arches seemed to transfer over into the very early Gen 1 cars too.     

 I've not had any rust issues on both Mazda 3's i've owned (Gen 2 and current Gen 3), my first one was 9 years old when i changed it out and there wasn't any rust on it that i could see, even the underneath was really good.  I'd guess Mazda have long since sorted out the sort of body rust on those last 323's but i think they still have issues with alloy wheel corrosion.       
Ford Escort 1.6 Ghia WNF 541S 1991 to 1992
Ford Orion 1.4L F965 KRJ 1992 to 1998
Mazda 323f 1.8 Executive P299 GBA 1998 to 2005
Mazda 323f 2.0 V6 ZXI SE S878 JHN 2005 to 2006
Mazda 323f 2.0 Sport SY02 ECJ 2006 to 2013
Mazda 3 2.0 Sport I-Stop FD59 VVB 2013 to 2019
Mazda 3 2.0 Sport Nav 165 - 2019

Offline bobmax

  • TS2 Class
  • ***
  • Posts: 218
  • Gender: Male
  • Body: Hatchback
  • Colour: Deep Crystal Blue Metallic (42M)
  • Engine: 2.0L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: SE L Nav
  • Year: 2014
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #21 on: July 29, 2020, 06:58:44 PM »
getting me worried now guys, I'll have to have a shimmy under the motor. :D
Familiarity breeds contempt - and children

Offline Solo_run

  • TS Class
  • **
  • Posts: 29
  • I need to update my signature strip!!!
  • Body: Hatchback
  • Colour: True Red (A4A) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: Sport
  • Year: 2016
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #22 on: July 29, 2020, 08:17:55 PM »
I'm hoping I'll be alright as I don't live anywhere near the sea (Coventry). I guess there would be no harm in doing a bit of maintenance on the car from time to time and I suppose ensuring the car is service regularly helps to prevent any major issues.

Offline Willpower

  • Administrator
  • Super Ultimate Class
  • *
  • Posts: 6553
  • Gender: Male
  • East Anglia Mountain Rescue Team
  • Body: Saloon
  • Colour: Winning Blue (27B) Metallic
  • Engine: 2.0L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: Sport
  • Year: 2004
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #23 on: July 29, 2020, 11:20:11 PM »
I guess there would be no harm in doing a bit of maintenance on the car from time to time and I suppose ensuring the car is service regularly helps to prevent any major issues.

To be blunt, I would hope that you would be doing that anyway. You are making a large investment. Looking after your car should be a no brainer.
Look at life through the windscreen, not the rearview mirror.
2004 Winning Blue 2Ltr Sport Saloon.  Laser Blue Main beams.

Offline Solo_run

  • TS Class
  • **
  • Posts: 29
  • I need to update my signature strip!!!
  • Body: Hatchback
  • Colour: True Red (A4A) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: Sport
  • Year: 2016
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #24 on: July 30, 2020, 12:07:53 AM »
I guess there would be no harm in doing a bit of maintenance on the car from time to time and I suppose ensuring the car is service regularly helps to prevent any major issues.

To be blunt, I would hope that you would be doing that anyway. You are making a large investment. Looking after your car should be a no brainer.

Definitely will be looking after it. It's going for its services and will have detailing done. I am likely to keep the car for minimum of 3 years and for the next three years I'll be looking at doing something like 63k miles in it (45 odd will be motorway) as I have bought it to get me to university. It already has 16k on it and it is 16 plate. I want it to have some resale value

Offline Engineer Andy

  • Sports Class
  • ****
  • Posts: 283
  • Gender: Male
  • Smoke me a kipper - I'll be back for breakfast!
  • Body: Saloon
  • Colour: Sunlight Silver (22V) Metallic
  • Engine: 1.6L
  • Fuel: Petrol
  • Model: Mazda 3
  • Transmission: Manual
  • Trim: TS2
  • Year: 2005
Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #25 on: July 31, 2020, 04:55:43 PM »
I'm hoping I'll be alright as I don't live anywhere near the sea (Coventry). I guess there would be no harm in doing a bit of maintenance on the car from time to time and I suppose ensuring the car is service regularly helps to prevent any major issues.

Serious corrosion can happen if you live or regularly drive through areas that get bad (icy / snowy) weather in winter that results in the local council or Highways England salting the roads on a regular basis in winter.  If it is, then you'd probably need to clear it off, including the underside, far more often so that the caked on salty water doesn't start the corrosion or make it worsen (and more quickly).  Often can be a lot worse if you live in a rural area near to a major trunk road.  More so if you use the car a lot.

Mazda 3 Forums UK

Re: Note to new buyers of old 2's and 3's....beware underbody rust!!
« Reply #25 on: July 31, 2020, 04:55:43 PM »