# 2005 Dodge Magnum - Cat replacement **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** dodge, exhaust-system\ **Created:** [December 5, 2022, 9:58pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762 "2022-12-05T21:58:13Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 5, 2022, 9:58pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/1 "2022-12-05T21:58:14Z")
I am looking at having to replace my right side catalytic converter for the third time after exactly 2 years almost to the day. I bought the car in 2016 and had to replace both converters 2 years later with all sensors. This replacement exercise is occuring almost exactly every 2 years. I have the feeling that this car has another undiagnosed problem that is causing this. We use this only for long trip driving, not intown, and have always used the recommended 89 octane, brand name gas. This is an Magnum RT Limited Edition, 5.7 Hemi, no AWD. We have put 45,00 miles on it since purchase i 12/16. Anyone have any info to help me figure out what is the problem? Thanks. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [December 5, 2022, 11:27pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/2 "2022-12-05T23:27:43Z")
Consistent with engine (for currently unknown reason) forcing too much raw gasoline into exhaust stream. Raw gasoline burns up in the cat, and the overheated cat eventually fails. This would usually show up in a fuel trim test, and ID the problem to the right side bank. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [December 5, 2022, 11:38pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/3 "2022-12-05T23:38:55Z")
After market versus oem or engine tune but why replace it if it hasn’t rusted off? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [December 5, 2022, 11:39pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/4 "2022-12-05T23:39:50Z")
[https://www.diyautoworksng.com/things-that-damage-catalytic-converters/](https://www.diyautoworksng.com/things-that-damage-catalytic-converters/) Tester ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [December 5, 2022, 11:43pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/5 "2022-12-05T23:43:10Z")
How much oil does the car use? High oil consumption kills cats. ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 5, 2022, 11:44pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/6 "2022-12-05T23:44:20Z")
thank you. ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 5, 2022, 11:45pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/7 "2022-12-05T23:45:20Z")
Uses no oil between changes. I watch it carefully. Thanks. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [December 5, 2022, 11:47pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/8 "2022-12-05T23:47:14Z")
When the cats were replaced, what did the substrate look like? Tester ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 5, 2022, 11:52pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/9 "2022-12-05T23:52:43Z")
Orig engine but my mechanics - from whom I bought it - did significant work due to previous owner allowing it to overheat due to coolant leak. I am very pleased how it runs and fuel use…mid 20s at 70mpm on cruise control on interstate. no overheating, no leaks/drips of any kind. Reg synthetic oil changes less than 10k miles watching intervals. thanks. ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 5, 2022, 11:56pm UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/10 "2022-12-05T23:56:23Z")
from what I discussed with my guys, all looked good, all new after market. They are very particular about what they sell me. I’ve been with them for almost 50 years…Any suggestions on brands…thanks. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [December 6, 2022, 12:04am UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/11 "2022-12-06T00:04:04Z")
I installed Walker cats. Tester ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 6, 2022, 12:06am UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/12 "2022-12-06T00:06:03Z")
Thanks. Any particular one…model #? How long did they/have they lasted? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [December 6, 2022, 12:07am UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/13 "2022-12-06T00:07:35Z")
I installed them in customer cars. Never had a come-back. ---
**Author:** ![Unhappyowner](https://avatars.discourse-cdn.com/v4/letter/u/3ec8ea/32.png) [@Unhappyowner](https://community.cartalk.com/u/Unhappyowner)\ **Post date:** [December 6, 2022, 12:12am UTC](https://community.cartalk.com/t/2005-dodge-magnum-cat-replacement/187762/14 "2022-12-06T00:12:06Z")
Thank you. I’ll have them get me whatever choices Walker has to offer…and not the lowest end model. Thanks again.