2021 MINI GP Problems: 13 Issues Every Owner Should Know
2021 model year · 1,005+ owner reports · Updated May 2026
According to Au7o's analysis of 1,005+ owner reports, the 2021 MINI GP has 13 documented known issues, with 6 rated critical. The most serious are High-Pressure Fuel Pump (HPFP) Failure (N14/N18/B48 Turbo DI) ($900-$2,200 repair), Intercooler Boost Pipe Blowoff / Silicone Coupler Failure (N14/N18/B48) ($60-$450 repair), Thermostat Housing/Coolant Outlet Leak (N18/B48) ($450-$1,200 repair), Front Brake Rotor Cracking/Heat Checking Under Track Use (GP2/GP3) ($450-$1,800 repair), Electric Water Pump Failure ($500-$1,200 repair) and Timing Chain Stretch and Rattle (N18/B48 Engines) ($1,200-$3,000 repair). The most commonly reported issue is Carbon Buildup on Intake Valves (Direct Injection) Causing Misfires/Power Loss with 200 owner reports. Across all issues, repair costs range from $60 to $3,000. DIY maintenance guides at au7o.io.