Service Bulletin - Due to variations in the purge control solenoid valve spring, the valve wears unevenly and intermittently sticks. This may result in setting DTC P0441 (Evaporative Emission (EVAP) System Purge Flow Malfunction).
full bulletin at NHTSA ↗2018 Acura RDX fuel system problems
moderate 17 complaints filed with NHTSA · avg repair $1,200 · see fuel system across all vehicles →
Complaints
17
Recalls
0
Avg fix
$1,200
What stands out
Fuel system accounts for 23% of all owner complaints filed against this vehicle, across 7 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering fuel system on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Dealer message - American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RDXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected), P0171 & P0174 (Rear/Front Bank Fuel System Too Lean), or P219A&B (Air-Fuel Ratio Variation of Cylinder) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RDXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected), P0171 & P0174 (Rear/Front Bank Fuel System Too Lean), or P219A&B (Air-Fuel Ratio Variation of Cylinder) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RDXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected), P0171 & P0174 (Rear/Front Bank Fuel System Too Lean), or P219A&B (Air-Fuel Ratio Variation of Cylinder) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RDXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected), P0171 & P0174 (Rear/Front Bank Fuel System Too Lean), or P219A&B (Air-Fuel Ratio Variation of Cylinder) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2018 Acura RDX vehicles report persistent fuel-system issues linked to NHTSA Campaign 23V858000. The core problem: recall parts have been unavailable for an extended period, preventing repairs. Owners describe hard starting (multiple attempts needed), sputtering at highway speeds, near-stalls with warning lights, loss of motive power (one case at 80 MPH resulting in complete deceleration), jerking, stalling, unintended acceleration, and console features going inoperable. Some failures are intermittent; others leave the vehicle unable to function safely. One owner experienced an unknown component continuing to run after shutdown.
Out of 17 complaints, only 5 owners reported actual drivability failures; the remaining 12 complained solely about the recall delay and parts shortage. The failures that did occur span mileages from 85,000 to 140,000 miles. Owners contacted dealers multiple times—all confirmed parts were unavailable. The manufacturer acknowledged the issue in most cases but could not provide a timeline for repairs. No independent repairs were completed, and no owners reported out-of-pocket fix costs because the recall remained unexecuted. This is purely a supply-chain problem compounding an underlying fuel-system defect.
Same Acura RDX fuel system reports on nearby years: 2019 · 2020
Failure modes owners describe
Hard-Start Condition
Vehicle requires several attempts to start or is difficult to start.
When: Unspecified mileage; one complaint at approximately 85,000 miles
Symptoms owners cite: Multiple attempts needed to start; Difficult to start
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Loss of Power While Driving
Vehicle loses motive power and decelerates to complete stop, then restarts and operates normally.
When: Approximately 140,000 miles
Symptoms owners cite: Loss of motive power at highway speed; Deceleration to 0 MPH; Check engine light illuminated; Emissions warning light illuminated
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Sputtering and Near-Stall While Driving
Vehicle sputters and nearly stalls during operation at moderate speed.
When: Approximately 85,000 miles
Symptoms owners cite: Vehicle sputtering; Near-stall condition; Yellow exclamation mark on instrument cluster; Intermittent failure
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Jerking, Stalling, and Unintended Acceleration
Vehicle jerks and stalls, with unwarned acceleration events.
When: Unspecified mileage
Symptoms owners cite: Jerking motion; Stalling; Accelerated without warning; Multiple unknown warning lights
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Jerking and Continued Operation After Shutdown
Vehicle jerks during operation; after shutdown, an unknown component continues running.
When: Unspecified mileage
Symptoms owners cite: Jerking while driving; Unknown component continues to run after ignition off
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Console Features Inoperability
Console features become inoperable; failure is intermittent.
When: Unspecified mileage
Symptoms owners cite: Console features inoperable; Intermittent failure
Repairs/costs cited: No repairs completed; recall parts unavailable at time of complaint
Recalls/TSBs owners mention: NHTSA Campaign Number 23V858000 (Fuel System, Gasoline); parts not available
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 6 most recent
The contact owns a 2018 Acura RDX. The contact received notification of NHTSA Campaign Number: 23V858000 (FUEL SYSTEM, GASOLINE); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts…
The contact owns a 2018 Acura RDX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated that the vehicle was difficult to start. The local dealer was contacted. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable…
The contact owns a 2018 Acura RDX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System Gasoline); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was contacted. The manufacturer was made aware of the issue. The contact had not experienced a…
The contact owns a 2018 Acura RDX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had…
The contact owns a 2018 Acura RDX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was unavailable. The contact stated that several local dealers were contacted and confirmed that parts were unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.…
The contact owns a 2018 Acura RDX. The contact stated that while driving at unknown speeds, the vehicle began to jerk. After turning off the vehicle, an unknown part continued to run. There were no warning lights illuminated. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline). However, the part to do the recall repair was not yet available. The local…
Had fuel system trouble with your 2018 Acura RDX?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the fuel system problem on the 2018 Acura RDX?
It's a documented issue but not catastrophic. 17 complaints have been filed. Repairs average $1,200 and most owners catch it before it causes a breakdown.
At what mileage does the fuel system typically fail?
Based on the 17 complaints filed, fuel system issues most often appear around 112,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $1,200 for fuel system repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to fuel system?
No active recalls currently cover fuel system issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Acura/RDX.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.