While driving across Florida, the “Check Engine” light and first of three DEF Head “Service Codes” on our 2018 Entegra Cornerstone 45’ RV came on, indicating that our Diesel Exhaust Fluid (DEF) system had an issue. From previous social media posts from other Entegra Owners, we immediately contacted the chassis manufacturer, Spartan. They requested that we contact Cummins-Orlando, FL for a DEF Head replacement. Cummins-Orlando said they couldn’t get us in for three weeks, which wasn’t an option, as we were traveling and couldn’t wait three weeks. We contacted Cummins-Tampa, FL and Cummins-Jacksonville, FL, with both stating 2-3 weeks to get us in. By this time, the second of three DEF codes came on, so the situation was getting more dire. We finally got through to Cummins-Ocala, FL and they were able to squeeze us in the next day. The third of three DEF Codes came on during the relatively short drive to Ocala, FL, but we were able to get there before the RV went into “limp mode” which restricts your speed to 5mph!! We were extremely worried about being stranded on the busy interstate Highway in a vehicle the size of a Greyhound Bus, limping along at 5mph with 18-wheelers whizzing by at 70-75mph! This DEF Head issue has been going on for several years and doesn’t seem to be getting any better, even though the manufacturer is on their 7th Generation of DEF Head technology. Luckily, Spartan had the DEF Head in-stock and was able to overnight it to Cummins-Ocala, but many others have been held up for days/weeks due to a back order on the replacement DEF Heads. I feel that a recall should be issued on all DEF Heads prior to the 7th Generation, in order to avoid the safety issues associated with being stranded on the highway with a failed DEF Head.
The worst 2018 Entegra Cornerstone problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine4
- Fuel system3
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine4
- Fuel system3
Recalls 4
Wheels: rim
- What is wrong
- Entegra Coach (Entegra) is recalling certain 2018-2019 Entegra Odyssey, Qwest, Aspire, Insignia, Anthem, and Cornerstone motorhomes. The Cargo Carrying Capacity (CCC) label incorrectly overstates the cargo capacity, potentially causing the vehicle to be overloaded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 120, "Wheels and Rims - Other than Passenger Cars."
- Risk
- An overloaded vehicle has an increased risk of a crash.
- Remedy
- Entegra will notify owners, and will provided a corrected CCC label, free of charge. The recall began on August 22, 2018. Owners may contact Entegra customer service at 1‑800‑517‑9137. Entegra's number for this recall is 9903405.
Recall number 18V450000 · Recall details
Exterior lighting
- What is wrong
- Entegra Coach (Entegra) is recalling certain 2016-2018 Aspire, Anthem, Cornerstone, and Insignia motorhomes. The vehicles have lights that do not include reflectors and the vehicle does not have separate reflectors. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
- Risk
- Without the required reflectors, the motorhome may be less visible to other drivers, increasing the risk of a crash.
- Remedy
- Entegra will notify owners, and dealers will install compliant reflectors, free of charge. The recall began on January 2, 2018. Owners may contact Entegra customer service at 1‑800‑945‑4787. Entegra's number for this recall is 9903363.
Recall number 17V695000 · Recall details
Fuel system, diesel
- What is wrong
- Entegra Coach (Entegra) is recalling certain 2018 Cornerstone motorhomes equipped with Cummins ISX 15L engines. These engines have a fuel pump whose drive gear could possibly slip on its drive shaft, causing a fuel pump function loss, resulting in an engine stall.
- Risk
- An engine stall can increase the risk of a crash.
- Remedy
- Entegra has notified owners, and qualified Spartan Service Center/Cummins Distributors will replace the fuel pumps, free of charge. The recall began on July 21, 2017. Owners may contact Spartan customer service at 1‑855‑589‑9836 or Entegra customer service at 1‑800‑517‑9137.
Recall number 17V441000 · Recall details
Suspension: front: control arm
- What is wrong
- Entegra Coach (Entegra) is recalling certain 2012-2013 and 2015-2018 Anthem; 2013 and 2017-2018 Aspire; and 2012-2018 Cornerstone motorhomes built on a Spartan Motors chassis. The ball joints on the independent front suspension (IFS) modules can loosen and separate, leading to a partial loss of steering.
- Risk
- A separated ball joint can cause a loss of steering control, increasing the risk of a crash.
- Remedy
- Entegra will notify owners, and Spartan service centers will remove, clean, apply thread locker, and reinstall the properly torqued ball joint, free of charge. The recall began on April 25, 2017. Owners may contact call Spartan customer service at 1‑800‑543‑4277 or Entegra customer service at 1‑800‑945‑4787.
Recall number 17V187000 · Recall details
Technical service bulletins for the 2018 Entegra Cornerstone 26
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- SRP ( Standard Repair Instruction) In certain conditions the Inverter/Charger shuts down due to high temp...
- Standard Repair Procedure (SRP)
- INC (Informational Communication) Regarding Pairing and programming key fobs.
- Standard Repair Procedure (SRP) Wiper Arm Replacement Instructions.
- Standard repair procedure: Shower enclosure and shower door installation instructions.
- Standard repair procedure (SRP)
- Generator Slide Tray extends when stopped or parked
- Instructions for programming and replacing dry contact module for awning.
- Process for cleaning soiled carpet
- Jayco and entegra coach storage tips
What 2018 Entegra Cornerstone owners say
Most recent owner complaints, unedited.
Vehicle has approximately 30,800 miles. A check engine light with error codes SPN: 3364, 1761, 3331 indicating a failure of the DEF ( diesel exhaust fluid) sensor. This results in a degrade in performance to a point of engine shutdown. Replacement parts are very hard to obtain because this error is so common.
DEF sensor failed twice. Potential engine derate or shut down. Problem well known to chassis manufacturer. Failure announced by Check Engine Light and three well known codes. Time or distance to derate/shutdown is unknown, and consequently could result in a large motor home stopped on the road.
Shortly after starting the engine a “CHECK ENGINE” warning appeared on the warning system. I went through diagnostics and found 3 codes relating to DEF head failure. There have been a large number of these in Entegra Coach motor homes in the last 6-12 months.
Compare the 2018 Entegra Cornerstone
Other model years
Questions about the 2018 Entegra Cornerstone
Is the 2018 Entegra Cornerstone reliable?
Owners have filed 4 complaints about the 2018 Entegra Cornerstone, 4.0 times a typical Cornerstone model year.
What is the most common problem with the 2018 Entegra Cornerstone?
Engine and cooling, with 4 complaints. Next is fuel system (3).
How many recalls does the 2018 Entegra Cornerstone have?
4 recalls, covering wheels, exterior lighting and fuel system, diesel.
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