Vehicle is having problems w original recall issues. Car stopping on its own on the highway, car says it’s on E all the time but has gas, car hesitates continually and sometimes just stops, electrical system is having major glitches, transmission and engine having major issues with hesitation and delay. I’ve bright it back many times and I’m beyond frustrated with no resolution. It’s unsafe to…
2018 Acura TLX electrical problems
moderate 16 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
16
Recalls
0
Avg fix
$850
When does it fail?
Of the 16 electrical complaints filed for the 2018 Acura TLX, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Among the 7 model years of Acura TLX in our records for electrical problems, this one ranks #3 by owner-complaint volume.
No new NHTSA electrical complaint has been filed on this vehicle in over 4 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: Owners report multiple unresolved electrical and drivetrain failures including random engine shutdowns, idle-stop/restart failures, ABS communication faults, and ADAS system malfunctions—many persisting through multiple dealer visits and software updates. These are safety-critical systems, and Acura's responses have been inadequate, making this model a risky purchase without independent pre-buy inspection of electrical systems, battery condition, and all safety subsystems.
The 2018 Acura TLX electrical complaints cluster around several interconnected failure modes that dealers struggle to diagnose or repair.
Idle-stop/restart failures are the most frequent complaint—the engine stalls without warning at traffic lights, intersections, and highway off-ramps, leaving owners unable to proceed. The vehicle shifts to Neutral involuntarily, and the battery lacks sufficient charge to restart. One owner nearly collided after stalling on a freeway off-ramp; another heard tires screeching as a car behind braked to avoid rear-ending them. Acura issued a PGM-FI software update in June 2022, but at least one owner applied it and the problem recurred the next day.
Random engine shutdowns while driving are a second major failure mode. The engine cuts out mid-drive at low speeds or in city traffic with zero warning—no lights, no codes, no sound. Owners lose power steering and brakes momentarily; the engine restarts after a manual key cycle. Dealerships cannot replicate the issue across multiple visits, and Honda's solution is to have owners tow the vehicle the next time it happens.
Secondary failures include ABS modules unable to communicate with the ECU (a known issue affecting multiple Honda/Acura models), ADAS system malfunctions (collision mitigation, lane-keeping assist, road-departure warning), keyless entry failures despite good batteries, spontaneous car alarm activation, fuel gauge reading empty when fuel is present, and transmission hesitation/stalling. One owner experienced a complete vehicle stability system failure that locked the transmission and disabled antilock brakes.
Same Acura TLX electrical reports on nearby years: 2015 · 2016 · 2019
Failure modes owners describe
Idle-stop/restart failure
Engine stalls unexpectedly during idle-stop operation or fails to restart after coming to a stop, leaving the vehicle unable to proceed. Battery charge is insufficient to support restart or maintain engine operation. No warning is given before the stall occurs.
When: At traffic lights, intersections, and highway off-ramps; intermittent but recurrent over years
Symptoms owners cite: Engine shuts off without warning at stops; Vehicle shifts to Neutral without driver input; Rapid ticking noise during attempted restart; Dashboard lights flicker during start attempt; Battery voltage insufficient to restart or keep engine running
Codes mentioned: Battery voltage low
Repairs/costs cited: Acura advised PGM-FI software update in June 2022 (at least one owner completed this without resolution); dealers have variously suggested battery replacement, trickle charging, or increased driving frequency; no verified repairs documented
Recalls/TSBs owners mention: PGM-FI software update issued June 2022; Acura acknowledged awareness of the problem (owner referenced forum discussion indicating this is a known issue); no formal recall issued
Random engine shutdown while driving
Engine cuts out abruptly mid-drive without warning lights, error codes, or diagnostic indicators. Vehicle loses power steering and acceleration. Engine restarts after manual off/on cycle. Cause remains undiagnosed despite multiple dealership visits.
When: At low speeds and on city roads; intermittent and unpredictable
Symptoms owners cite: Engine cuts out without warning; No dashboard warning lights or alerts; Loss of power steering; Loss of acceleration; Vehicle restarts after manual restart attempt
Repairs/costs cited: Dealership unable to replicate or diagnose issue through multiple service visits; no parts replaced
Recalls/TSBs owners mention: Honda advised towing the vehicle the next time it occurs; case opened with American Honda with no resolution offered beyond repeat inspections
Keyless entry/push-button start failure
Vehicle does not recognize keyless remote or respond to push-button start despite remote being in range with a good battery. Vehicle cannot be started despite key fob presence.
When: Intermittent; owners stranded multiple times
Symptoms owners cite: Vehicle does not recognize keyless remote; Push-button start fails to engage; Rapid ticking noise during start attempts; Dashboard lights flicker
Repairs/costs cited: No repairs documented; dealers unable to replicate issue
ABS module / brake system communication failure
ABS module cannot communicate with ECU, causing warning lights and system malfunction. Affects wheel speed sensors and brake operation. Owner states this is a known issue affecting TLX, TSX, TL, RL, and Odyssey models.
When: Ongoing; multiple mechanics confirm it is common in Honda/Acura vehicles
Symptoms owners cite: ABS warning light; Brake system warning light; ABS module does not communicate with ECU; Wheel speed sensor malfunction
Codes mentioned: ABS module / ECU communication fault
ADAS system malfunction (CMBS, ACC, LKAS, Road Departure Mitigation)
Advanced driver-assistance systems fail and display error messages. Systems reported non-functional by the vehicle. Owner reports error lights activated after an oil change service visit.
When: September 2023 (after oil change service)
Symptoms owners cite: CMBS (collision mitigation) warning light; ACC (adaptive cruise control) warning light; LKAS (lane keeping assist) warning light; Road Departure Mitigation System warning light; Brake system warning light
Codes mentioned: Camera sensor fault (reported by dealer)
Repairs/costs cited: Dealer attributed to camera sensor issue; no repair details provided; owner mentions $1000 repair in October 2024 for unrelated car alarm issue
Vehicle stability system / transmission lock failure
Vehicle stability system displays failure warning lights. Complete system failure occurs: transmission locks and cannot be shifted to Neutral, antilock brakes inoperative. Occurs during highway driving.
When: After 40-mile trip
Symptoms owners cite: Vehicle stability system failure warning light; Transmission locked, cannot shift to Neutral; Antilock brakes inoperative
Codes mentioned: Vehicle stability system fault
Headlight flickering
Headlights flicker intermittently during operation. Diagnosed as low battery amperage.
When: At approximately 50,000 miles
Symptoms owners cite: Headlights flicker
Repairs/costs cited: Independent dealer diagnosis: low battery amps
Check engine light with electrical parking brake and emissions errors
Check engine light illuminates with two stored error codes: electrical parking brake problem and emissions system problem. Occurs after parking and reappears when vehicle is restarted.
When: Early in ownership (vehicle acquired July 2017 with only 3,228 miles)
Symptoms owners cite: Check engine light; Electrical parking brake error message; Emissions system error message
Codes mentioned: Electrical parking brake problem, Emissions system problem
Car alarm spontaneous activation
Car alarm activates repeatedly without any trigger or driver action. Multiple activations occurring in short time windows.
When: October 2023 onward; recent occurrences overnight (12:30 am, 1:30 am, 2:30 am on one occasion, repeated a week later)
Symptoms owners cite: Alarm sounds without cause; Multiple activations in short time period; Overnight activations
Repairs/costs cited: One owner reports $1000 repair bill in October 2024; no details on parts or fix provided
Fuel gauge malfunction
Fuel gauge displays empty (E) when fuel is present in tank. Vehicle hesitates and stalls despite adequate fuel.
When: Ongoing from purchase
Symptoms owners cite: Gauge reads E when fuel present; Engine hesitation; Engine stalling despite fuel available
Transmission hesitation and delay
Transmission exhibits sluggish response, hesitation, and delayed engagement. Intermittent stalling. Owner reports multiple dealer visits with no resolution.
When: Since purchase (problem from day 1)
Symptoms owners cite: Transmission hesitation; Delayed engagement; Intermittent stalling; Engine hesitation
Repairs/costs cited: Multiple dealer visits; no resolution documented
Synthesized from 16 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
I've had multiple failures on this vehicle. First, the engine had a rod knock and Acura gave me a very hard time approving the repair and eventually replacement of the engine. Second, the ADAS system is not working and is a huge safety concern. I keep getting error messages that my road mitigation and lane keeping assist systems do not work. Third, the ABS module system cannot communicate with my…
For the past two days I see the check engine indicator pop up along with two errors. "electric parking brake problem" and "emissions system problem" this happend after driving and parking the car. The next day I turned the car on and saw the errors. Not sure what cpuld be the cause of this. I recently purchased this unit. Had it since july 2017 with only 3228miles. Please advise. Thank you.
Odometer Fraud. The contact purchased a 2018 Acura TLX. The contact stated that it was discovered that there was a mileage discrepancy. The vehicle was purchased on September 10th, 2025, as a dealer sale. At the time of purchase, the vehicle mileage was 76,410. At the time of registration, when the title was received, it was discovered that the mileage was 176,410. The title read, "Not Actual…
In September 2023 went in for an oil change. Next day all My CMBS, ACC, LKAS and Road Departure Mitigation System all light up on my dashboard as well brake system light. I called and took the car in they said that it had something to do with the camera sensor. I left a complaint and the manager called after I explained to him he said he would call me back. 1.5 years later he never called…
Had electrical trouble with your 2018 Acura TLX?
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 electrical problem on the 2018 Acura TLX?
It's a documented issue but not catastrophic. 16 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 16 complaints filed, electrical issues most often appear around 49,289 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 $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/TLX.
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.