2021 MCLAREN SENNA M840TR (P14)
P14 / Two-door coupé / Global (limited production, verified markets only)
M840TRExact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Very limited data due to low production and meticulous maintenance requirements
- Potential turbocharger wear over extended track use
First checks
- Verify service history due to specialized maintenance requirements
- Inspect carbon ceramic brakes for uneven wear
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Senna produced in limited numbers from 2018 through 2019 production years; 2021 cars are rare leftover or special editions but share the same core specification.
- Market variations minimal due to limited production; all typically share the same engine (M840TR) and drivetrain.
- Engine oil capacity includes service-fill with oil filter replacement.
- No manual transmission option was ever offered.