2020 Acura RDX engine problems

“The contact owns a 2020 Acura RDX. The contact stated that while driving 40 MPH, the vehicle lost automotive power. The vehicle was towed to a dealer where it was diagnosed, and the contact was informed that the head gasket had failed and that the engine and head gasket needed to be replaced. The manufacturer was notified of the failure. The failure mileage was 75,000.”

“The vehicle had 84400 miles at the time a blown head gasket was diagnosed by a Honda factory dealer. Was told not to drive vehicle further as sudden and catastrophic engine failure could occur. Unexpected and sudden engine failure at moderate to highway speeds, can create serious safety issues for passengers, nearby vehicles, and pedestrians. The vehicle has been serviced as scheduled at the local Honda factory dealer since new with supporting receipts. No engines repairs had been made to the vehicle since new. The issue was identified when the car was in for routine scheduled maintenance and I asked the dealer to check for the cause of momentary rough idle at engine startup. No diagnostic codes were set or found. This relatively new low milage vehicle has never overheated or been exposed to driving conditions that one would expect to be related to a blown head gasket. During repair, no issues were found with either the head or block. The master technician indicated it appeared the head gasket was faulty and failed.”

“The vehicle’s keyless access/security and body control system malfunctioned. An authorized Acura dealer previously diagnosed water intrusion from blocked panoramic sunroof drains, including water reaching the Body Control Module (BCM) Multiplex Control Unit. The dealer reported that this was causing false security alarm activation and battery drainage and recommended BCM replacement. The vehicle and affected components are available for inspection upon request.The condition has since escalated. The security alarm repeatedly activated without cause and became difficult or impossible to silence. The dashboard displayed, “Keyless Access System Problem\. See Your Dealer.” During the latest episode, the engine spontaneously started without an authorized remote start command, and attempts to stop the engine were unsuccessful. The 12-volt battery was therefore disconnected to disable the vehicle and will remain disconnected until the vehicle is taken to the Acura dealership for diagnosis. This created a safety risk because the vehicle demonstrated unintended engine operation and loss of normal control over engine shutdown, creating potential risks of unintended…”

“My RDX experienced a water-intrusion failure involving the panoramic sunroof drainage system and associated electrical components. An authorized Acura dealer diagnosed the right-front sunroof drain as backed up/overflowing, allowing water to reach the Body Control Module (BCM/Multiplex Control Unit). The dealer attributed abnormal security-alarm activation and battery drain to the water-damaged BCM and indicated that the BCM required replacement. The dealer also identified a blocked right-rear sunroof drain that allowed water to reach the tuner, causing radio/stereo malfunction and requiring tuner replacement. The water intrusion reached critical electrical components and caused unpredictable electrical behavior, including unexplained security-alarm activations, exterior lights remaining illuminated, complete battery discharge, loss of keyless access, and ultimately a no-start condition that rendered the vehicle inoperable. After the battery was depleted, I had to use the manual key to enter the vehicle. This created a risk of being stranded and raised concerns about the reliability of the vehicle’s electrical systems. There were no known dashboard warning…”

“This is a well known problem that when water gets into the intercooler, the car goes into limp Mode. This happens to my daughter, while driving 85 miles in the fast lane in the highway. Her check engine light started flashing, she was unable to accelerate, and she was scared! She had to pull over in the left lane, against the median.This is a safety hazard! I am paying over $1000 to have this fixed. TSB 20-053 this should be a recall!!”

“My 2020 vehicle lost all power when I was attempting to pass an 18-wheel trailer on the expressway. I took it to the dealership which was less than a mile away. They told me I needed a head gasket replacement @$6500. They replaced the HG and it ran great for 5-6 months. Then exact same thing happened again on expressway. It was another head gasket. After searching online I found a lot of history on my vehicle where the 2.0L turbo engine was failing prematurely.”