Honda civic 2018 manual transmission. Occasionally, while in motion on city streets, when shifting into 2nd or 3rd gear the gears won't fully engage. The clutch needs to be disengaged and reengage and the car shifted into nuetral and back into gear before the gears will seat properly.
2018 Honda Civic powertrain problems
severe 11 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
11
Recalls
0
Avg fix
$2,500
1crash
1fire
When does it fail?
Of the 11 powertrain complaints filed for the 2018 Honda Civic, 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
No new NHTSA powertrain complaint has been filed on this vehicle in over 7 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: The 2018 Civic has a troubling pattern of powertrain failures: engines stalling or catching fire, manual transmissions with persistent shifting problems, persistent battery drain, and unresolved misfiring—often without dealer diagnosis or manufacturer fixes. Budget for diagnosis and repair costs exceeding $9,500 if major engine work is needed.
The 2018 Civic powertrain complaints cluster around several recurring issues. Engine stalling occurs at low speeds with no clear cause; one owner's stall triggered unexplained airbag deployment. More severe: an engine fire that broke out on highway entry with no warning, accompanied by AC line failure. Another owner faced complete engine overheating at 68k highway miles despite proper maintenance, with repair quotes reaching $9,500.
Manual transmission problems are widespread: notchy, non-smooth shifting that doesn't return to neutral smoothly, difficulty reverse engaging, and occasional gear engagement failures requiring multiple shift attempts while driving. Engine performance issues include violent jerking during acceleration with flashing check lights and cylinder 1 misfiring; cold-start stuttering with hard shifting happening randomly.
Electrical gremlins surface as battery drain during non-use despite multiple battery and alternator replacements—dealerships remain unable to diagnose the root cause after multiple visits. One vehicle rolled downhill while parked in gear, and owners note this recurring across 2016-2018 models reported to Honda since 2016.
AC condenser failures appear with denials on extended warranty claims due to VIN exclusions, though Honda issued a 10-year warranty (TSB 19-091) for this exact issue on this model year.
Same Honda Civic powertrain reports on nearby years: 2015 · 2016 · 2017 · 2019 · 2020
Failure modes owners describe
Engine stalling and unintended airbag deployment
Vehicle stalled during low-speed maneuver (turning from stop sign on wet cobblestone road), then stalled again. Passenger airbag deployed unexpectedly with no impact detected. Owner researched and identified fuel pump recall as potential cause of stalling. Dealer initially dismissed the complaint and did not investigate.
Symptoms owners cite: Engine stalling at low speed during turn; Stalling occurs twice in sequence; Passenger airbag deploys without impact; No visible damage to vehicle
Recalls/TSBs owners mention: Fuel pump recall exists; dealer initially denied any recalls on 2018 Civic.
Engine fire and combustion issues
Engine caught fire while merging onto highway. Owner reports hearing a sound like engine blowing up, then visible engine fire. AC line also became hot and exploded. Owner notes multiple check engine light codes that clear after restart, and persistent lack of power since purchase. Concerns raised about 1.5L turbo engine design.
Symptoms owners cite: Engine fire while in motion on highway; Sound of engine blowing up before fire; AC line overheating and exploding; Intermittent check engine light codes that clear on restart; Chronic lack of power throughout ownership
Codes mentioned: Check engine light (codes not specified)
Engine overheating and mechanical failure
Vehicle overheated on highway at 68k miles with no prior leaks or warning signs. Owner reports warning lights appeared, had less than 2 minutes before pulling over. Vehicle maintained on dealer schedule. Extended warranty (Portfolio Elite Protection, 5yr/100k) denied claim. Repair cost quoted at $9,500.
When: 68,000 miles
Symptoms owners cite: Engine overheating on highway; Warning lights on dashboard; Rapid onset (less than 2 minutes)
Codes mentioned: Multiple warning lights (codes not specified)
Repairs/costs cited: $9,500 repair cost estimated
Recalls/TSBs owners mention: Extended coverage plan (Portfolio Elite Protection) denied claim; owner believes design defect in engine cooling.
AC condenser failure
AC stopped blowing cold air. Dealer identified faulty part not covered under basic 3yr/36k warranty (owner was ~10k miles over). Owner discovered Honda had issued extended 10-year condenser warranty (TSB 19-091) for 2016-2018 Civics, but owner's VIN was not recognized as eligible despite matching year and having same faulty part. Repair cost $1,000.
When: Approximately 46,000 miles (10k over 36k warranty)
Symptoms owners cite: AC not blowing cold air; Complete loss of AC function
Repairs/costs cited: $1,000 for faulty condenser replacement
Recalls/TSBs owners mention: 10-year condenser warranty issued (TSB 19-091) for 2016-2018 Civics, but owner's VIN denied coverage despite eligibility criteria being met.
Transmission shift failure and sunroof crack
Gear shift failed to engage any gear from park position. Sunroof also had a crack. Owner notified dealer (Norm Reeves Honda) and manufacturer but vehicle was not diagnosed or repaired at time of report. Mileage and VIN unavailable.
Symptoms owners cite: Gear shift locked in park, cannot engage any gear; Sunroof cracked
Recalls/TSBs owners mention: Manufacturer notified; vehicle awaiting dealer response.
Vehicle rolling down hill while in park
Vehicle parked on incline in park gear. Owner exited and entered home. Vehicle spontaneously rolled down hill and hit tree sometime after owner went inside. Owner reports this is recurring issue affecting 2016-2018 Civics and has been reported to Honda since 2016.
Symptoms owners cite: Vehicle rolled downhill while parked; Occurred after owner exited vehicle
Recalls/TSBs owners mention: Issue reported to Honda Corporation since 2016; pattern noted across 2016-2018 model years.
Battery drain and starting failure
Owner replaced alternator believing it was draining battery. After replacement, vehicle would not start after 3 days of no driving despite new battery and all lights functioning. Owner replaced battery multiple times (at least 4 occurrences). Taken to dealership multiple times but root cause remains undiagnosed.
Symptoms owners cite: Battery drains during periods of non-use (3+ days); Engine will not crank or start; All electrical lights function normally; Problem recurs multiple times (at least 4 instances)
Repairs/costs cited: New alternator installed; new battery installed multiple times.
Recalls/TSBs owners mention: Dealership unable to diagnose root cause after multiple visits.
Manual transmission notchiness and gear engagement
Manual transmission exhibits notchy, rough shifting. Gears do not return smoothly to neutral. Difficulty engaging reverse gear. Owner reports seeing multiple complaints on SI forums. Issue is persistent while driving or stationary, noticed immediately after purchase.
Symptoms owners cite: Notchy, non-smooth shifting; Knocking sensation in transmission; Gears do not return to center/neutral; Difficulty getting into reverse; Issue present both while driving and stationary
Engine misfiring and loss of power control
While accelerating to 60 mph, vehicle began jerking violently. Check engine light flashed and throttle control was lost until vehicle slowed below 20-25 mph. OBD2 scan revealed misfiring in cylinder 1. Misfiring has intensified, rendering car undrivable under normal conditions. Vehicle is 2018 Civic SI.
Symptoms owners cite: Violent jerking during acceleration; Flashing check engine light; Loss of throttle control; Persistent cylinder 1 misfiring; Intensifying misfiring over time; Vehicle unable to be driven under normal conditions
Codes mentioned: Cylinder 1 misfire
Transmission gear engagement failure
Manual transmission occasionally fails to fully engage when shifting into 2nd or 3rd gear while driving. Clutch must be fully disengaged, car shifted to neutral, then re-engaged into gear before gears seat properly.
Symptoms owners cite: Gears fail to fully engage into 2nd or 3rd gear; Occurs while in motion on city streets; Requires multiple shift attempts to seat properly
Cold start stuttering and transmission shift hardness
Vehicle stutters on cold start and when accelerating in any gear, with symptoms suggesting fuel cutoff. Transmission exhibits intermittent hard shifting—alternating between difficult and normal gear changes unpredictably.
Symptoms owners cite: Stuttering on cold start; Stuttering during acceleration in any gear; Sensation of fuel cutting off; Hard shifting (intermittent/random); Alternates between hard and normal shifting
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had powertrain trouble with your 2018 Honda Civic?
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 powertrain problem on the 2018 Honda Civic?
It's a meaningful issue. 11 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 11 complaints filed, powertrain issues most often appear around 27,875 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 $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/Honda/Civic.
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.