Dorman 902-3035HP Patented Thermostat Housing Assembly with Thermostat Compatible with Select Chrysler Dodge Models OE FIX

My 2015 Charger SXT had a P0128 code and I bought this to fix the code. After the repair and burping of the system, I noticed that my coolant was operating properly at the correct temperature over 200 degrees. Before it never went over 170 degrees and I noticed how much my car had more power! Very easy install! Cleared code and my car runs awesome now!! Definitely cop!!💯😎 Especially over the plastic housing ones.. Read more

2016 Dodge Challenger SXT. So, I am a Dorman fan here, but I did have my scare with this product.(Explanation in the long review.) Short Review: Works perfectly fine, it fit perfectly, lasts a relatively long time, build quality is exceptional, very durable, warranty claims live up to their policy. You get the value for the extra clams you spare. To replace the thermostat, you have to buy the housing as well for people that don’t know this. Long Review: Okay, so let’s get started. I have officially had this product for a year and three days now. It has worked like a charm except for one scary thing that happened a month ago when it started to get cold. I was driving and saw a check engine light pop up and thought it was odd, so I read it and it said thermostat. (It normally pops up when operating temps aren’t reached within 10 minutes). Shrugged it off and cleared it since it was absurdly cold. It happened again, so considering I have not had this product for a year, I reached out to Dorman and told them I think I have a faulty thermostat. (this is why they keep five stars.) Gave the details as of why, etc. No hassle, they sent me a new one. I start to take off the old one and immediately, the spring falls out and the tensioner that holds the spring in place is chilling inside the block. (This is the scary part..) Anyway, I have replaced it with another one and I do trust their parts. Things happen and it does fit perfectly, built very well, and I do believe that they do last a very long time, I just got a dud. Don’t let my story scare you out of buying it, as I am still running one of these. Read more

Very well made and fit as designed. Went awesome with the aluminum water outlet housing! A must upgrade for the Dodge pentastar! Read more

works great exceeds oem. quality Dorman product Read more

Great buy solved my p0128 code issue instantly. Will be replacing other plastic parts with aluminum in the future. Read more

Thermostat Housing assembly received in late September 2023, but was not installed until May 2024. Assembly was as received shown in photo 1 (screenshot from the Amazon listing). The assembly was installed in May and vehicle was fine with no problems until the winter about 6 months later. Then the vehicle would set an Engine Trouble Light and my code reader would show Code P0128 "Thermostat Rationality" - which basically means the thermostat is not allowing the engine to reach the expected temperature as quickly or completely as expected given the length of time and conditions during which the vehicle had been run or driven. I erased the code with Blue Driver and the instant code went away turning the MIL lamp off, only to have the trouble code re-appear several days later. This went on for about a month or so, then we did not see the code again until February of this year, when it began to occur about every three days or so. I ordered the Genuine MOPAR Thermostat Housing Assembly, as that is the only way to get a genuine MOPAR thermostat. It was little hard to find as many dealers messaged that it was on 'backorder' but I finally found a dealer source and got the part ordered. I drained the coolant and removed the Dorman aluminum housing and disassembled it completely to get a good close look at the actual thermostat components to try to understand why it had failed. So to be clear, the problem is not with the aluminum housing, it was the "thermostat components" in the housing that were causing the problem. See the second photo - it shows the disassembled components from bottom to top in an exploded view. To remove the thermostat components from the housing, compress the spring and rotate the stainless steel retainer out the slots and all the parts can be laid out as shown. If you look inside the coolant passage of the housing, you can see a rubber seal laying across the raised portion that the thermostat "pill" plunger pin bears on to allow the thermostat to open against the force of the spring. That seal is supposed to be fixed into the groove around the perimeter of the stainless steel thermostat disk. You can see that the groove on the disk is empty. So the seal worked its way out of the retaining groove and ended up caught in the coolant passage. This happened over time and likely finally completely dislodged in February. What this means is that the thermostat was unable to completely seal the coolant into the engine block for warmup as it would leak around the edge of the disk. See the last photo for more detail. I did not take more detailed photos, but the visible wear and tearing on the seal ring shows that it was at least partially loose and was partially caught in between the disk and the housing, rubbing causing visible tearing on the surface of the seal. Looking at the thermostat disk itself, I can see that the perimeter groove is not uniform in width and it appears that the crimp made around the rim was not uniform or was possibly not centered on the disk, resulting in variation in width of the groove and inability to correctly retain the seal ring. These are quality control issues or manufacturing defects. My advice is to get the DORMAN housing as it is a quality part, but remove your old MOPAR thermostat from the OEM plastic housing, remove the Dorman supplied parts from the aluminum housing, and re-assemble the MOPAR thermostat parts into the aluminum housing. I did this with a new MOPAR thermostat, re-installed on car, and its working as expected with no issues. Read more

Perfect replacement for one on a 2018 Dodge Charger 3.6l. Rather simple and straightforward to change out the part and fixed the problem of not heating up fast enough. I don't remember the code. Fit great! Read more

Works great than a plastic one. No more check engine light. Read more