Reliability Statistics 2026 (Engine 1.0 vs 1.5)

Mechanics
1

Hello everyone,

I am creating this survey with the aim of collecting data and obtaining a clearer and more objective view on the reliability of both engines, as it is a topic that appears recurrently in the forum and often generates many doubts, especially among future buyers and new owners.

The goal is not to point out or defend any specific engine, but to gather real user experiences to draw conclusions based on the widest possible sample. The more of us participate, the more representative and useful the results will be.

I encourage you to vote sincerely according to your personal experience and, if you wish, to expand the information in the comments by indicating mileage, maintenance, and type of use, as these data can greatly help contextualize the survey results.

  1. Number of users of both engines participating in the survey:
  • 1.0t
  • 1.5t
0 votantes
  1. Experience with the engine:
  • Stock 1.0 engine (no problems)
  • Stock 1.0 engine (with problems) (explain in comments)
  • Stock 1.0 engine (total breakdown) (explain in comments)
  • Stock 1.5 engine (no problems)
  • Stock 1.5 engine (with problems) (explain in comments)
  • Stock 1.5 engine (total breakdown) (explain in comments)
  • Modified 1.0 engine (no problems)
  • Modified 1.0 engine (with problems) (explain in comments)
  • Modified 1.0 engine (total breakdown) (explain in comments)
  • Modified 1.5 engine (no problems)
  • Modified 1.5 engine (with problems) (explain in comments)
  • Modified 1.5 engine (total breakdown) (explain in comments)
0 votantes
2

Podeis ir poniendo los datos como yo, especialmente si vais modificados. Algunos no sabreis todos los datos, poned los mas relevantes o los que sepais.

Vehículo: Civic Sport 2017 (FK7)

Motor: 1.5 turbo (L15BA)

ECU: 5AN-G23

Combustible: 98 RON E5 (solo Repsol o Shell)

LTFT: ~3

Tiempo total reprogramado: +7 años

Kilometraje total reprogramado: 145.000 km

Kilometraje total: 156.000 km

Dispositivo(s) de reprogramación utilizados: KTuner V1.2

Mapas utilizados:
Todos los basemaps de KTuner 21 (nunca configuraciones agresivas), TSP Stage 1 y actualmente mapa personalizado (e-tune) realizado por Derek Robinson en IMW tuned.

Modificaciones adicionales del motor:
Intercooler Mishimoto, admisión CAI 27won, turbo 27won W1 (lo quité, lo pondré mas adelante de nuevo), downpipe catalizado 27won, inlet pipe 27won, Race MAF 27won, volante motor monomasa ACT (kit de embrague orgánico ACT).

Modificaciones de transmisión:
Diferencial autoblocante helicoidal MFactory + aceite de transmisión Amsoil MTF.

Problemas/incidencias:
La válvula PCV se quedaba a veces abierta; la sustituí yo mismo. También tuve problemas con los fuel trims llegando ocasionalmente a -25 (posiblemente relacionado con el problema de la válvula PCV). En 2025 me volvió a fallar la PCV y el tubo de la PCV (les pasa a todos con el tiempo).

En 2025 se me escapó la palanca de cambios de la mano y al volver a cogerla acabe metiendo 2ª en vez de 4ª por error, por suerte no estaba apurando del todo las rpm y fui muy rápido pisando el embrague de nuevo, el motor llegó a +8000 rpm sin notarse ningún fallo.

Estilo de conducción:
Conducción rápida con aceleraciones agresivas puntuales. Nunca paso de 2 PSI hasta que el motor está caliente y nunca acelero a fondo hasta que la temperatura del refrigerante (ECT) está a mas de 80 ºC y la del aceite a mas de 60ºC (tengo medidor en el carter). Intento no acelerar a fondo por debajo de 3.000 rpm, especialmente en marchas largas. Uso el coche en circuito de vez en cuando y también para conducción deportiva en carreteras de montaña. Uso diario (cada vez mas de 2ndo coche o viajes).

3

Vehicle: Honda Civic 1.5 Sport Plus 2020

Reprogrammed Time: 4 years

Mileage: 98,500km and reprogrammed at 70,000km

Reprogramming Device Used: KTuner V1.2

Engine Modifications: Mishimoto intercooler and K&N replacement air filter

Issues: There haven’t been any engine issues as such, but the left engine mount and right engine mount broke. They were replaced under warranty, and I later installed the rear Hardrace mount.

With PCV at 98K, I haven’t had any problems yet.

4

Vehicle: Civic Sport 2018 (FK7)

Engine: 1.5 turbo (L15BA)

ECU: ?

Fuel: 95 E5 (only Repsol or Shell, occasionally Cepsa/Moeve)

LTFT: ?

Total mileage: 142,000 km

Problems/issues: None.

I’m stock with a K&N filter and the spark plugs we did as a forum group, everything else as indicated by Honda, with maintenance according to the book (remember they messed up my maintenance information system). Only used Motul 0w20 oil so far.

The fuel pump was replaced as part of a campaign, but it wasn’t failing.

5

I will first share the data of my first CivicX and then share the current one.

Vehicle: Civic 2018 (FK6)

Engine: 1.0 turbo 129hp

Fuel: 98 RON E5

Total time remapped: +5 years

Total mileage remapped: 120,000 km

Total mileage: 135,000 km (when I sold it)

Remapping device(s) used: Bluespark

Maps used: Normally in D mode, for routes and long trips, E mode

Additional engine modifications: K&N filter

Problems/issues: None, all maintenance done at an official dealership (including belt change, fuel pump)

Driving style: Fast driving with occasional aggressive accelerations. I never accelerated fully until the temperature was at its default value. Daily use for commuting to the office, shopping, or trips.

8

Vehicle: Civic Elegance Navi 2018

Engine: 1.0 turbo 129hp

Fuel: 95 at the cheapest gas stations I find

Total mileage: 115,000 km

Problems/issues: Under warranty, the starter motor was replaced because it squeaked, other than that 0 problems. All campaigns completed and maintenance always at the official dealership (Murcia).

Driving style: Mainly highway and trips, at legal speed with the occasional burst of speed.

I leave it here for those who are afraid of the 1.0…

9

Vehicle: 2019 Civic Sport Plus

Engine: 1.5 turbo, completely stock

Fuel: 95 octane from wherever is closest

Total mileage: purchased in Mar-23 with 61k km, sold in Jul-25 with 89k km

Problems/issues: None attributable to the engine. A/C evaporator failure and front/left shock absorber, both replaced under warranty. I also had the fuel pump recall done, though it wasn’t causing any problems. All work performed at an official dealership.

Driving style: Daily commute to work and getting around the area, mostly city and local roads, with the occasional highway trip. Usually a spirited pace enjoying the car, but without pushing it too hard or being reckless.

10

Vehicle: 2021 Civic Comfort-Sport line

Engine: 1.0 turbo

ECU: possibly

Fuel: 98 (Repsol only)

Total time tuned: 4 years

Total tuned mileage: since 3,000km (I have almost 80k)

Total mileage: 79,000 km

Tuning device(s) used: Bluespark (Mode E)

Maps used: I started in mode “C”, moved to “D”, and I’ve only used “E” for years now

Additional engine modifications: K&N Filter, Pedalbox

Exhaust modifications: Sport rear section, modified mid-section, replacement of the original exhaust flex pipe.

Transmission modifications: Acuity Stage 2

Issues/incidents: A turbo whistle, ultimately caused (I hope) by the exhaust modifications (+2 years now).

Fault with all warnings triggered due to poor contact in the PedalBox, easily fixed by disconnecting and reconnecting.

Driving style: Daily for work, occasional spirited B-road runs, and one track day. I’m very careful about the one-minute cold warm-up, and I don’t even turn on the heating until I see that the engine temperature is stable :grin: