Compare two new cars by price, estimated monthly payment, fuel economy, and other specifications. Data comes from the CarPayCheck.com catalog and uses your selected financing terms.
| Q8 | X7 | |
|---|---|---|
| Manufacturer | Audi | BMW |
| Starting price | — | — |
| Monthly payment | — | — |
| Fuel type | Hybrid | Hybrid |
| Fuel economy | 19.0 mpg | 18.0 mpg |
| CO₂ emissions | 459 g/mi | 386 g/mi–505 g/mi |
| Annual maintenance cost | — | — |
The 2019-2020 Audi Q8 55 TFSI mild-hybrid models can experience a 48V belt-driven starter-generator (BSG) fault that causes sudden loss of motive power, engine stalling, or an 'Electrical System: Fault' warning. This can lead to limp-home mode, an inability to restart, and in some cases the engine cutting out while driving. Owners may notice the start/stop system malfunctioning before the full failure occurs. This issue has also been reported in 2020-2021 model years through service campaigns.
The BMW X7 has several documented problems, with the most common being rear air suspension leaks, Valvetronic actuator faults, cooling system leaks, premature front brake rotor pulsation, and battery drain. These issues affect various model years from 2019 to 2023, leading to symptoms like suspension collapse, engine power loss, coolant loss, brake vibration, and dead batteries. Ignoring these problems can lead to more severe damage, such as compressor burnout, engine overheating, or starting failure.
Yes, the BMW X7 (especially 2019-2021 models) commonly experiences rear air suspension leaks, leading to the vehicle sitting low, particularly on one rear corner. This triggers a 'Chassis malfunction' or 'Level control malfunction' warning, and if ignored, the air compressor may burn out. Replacement of a rear air spring typically costs between $1,200 and $3,200 depending on the service provider.
The Valvetronic actuator and eccentric shaft fault is common in 2019-2021 BMW X7 xDrive40i models with the B58 engine. Symptoms include check-engine light, rough idle, loss of power, and limp mode. The repair typically costs between $1,200 and $3,500, with independent shops at the lower end and dealerships at the higher end.
Cooling system issues, particularly with plastic components, are common in 2019-2021 X7s with the B58 engine. Symptoms include frequent 'low coolant' messages, coolant puddles, and overheating if ignored. Repairing the expansion tank and hoses costs $400-$900, while replacing the electric water pump can cost $900-$1,700.
Premature front brake rotor pulsation, causing vibration in the pedal and steering wheel, affects many 2019-2023 X7s, especially V8 models. The issue is likely due to the vehicle's weight and brake pad bedding. Replacing front rotors and pads costs $850-$2,500, depending on the shop (independent versus dealer).
Battery drain in 2019-2021 BMW X7s with iDrive 7 often results from modules not entering sleep mode, causing the battery to die after a few days of sitting. This can lead to no-start situations and repeated jump starts, harming the AGM battery. Diagnosis costs $200-$400, an AGM battery replacement is $500-$800, and a module software update can cost $300-$600.
Audi Q8 and BMW X7 suit different driving needs. The main differences below cover price, monthly payment, fuel economy, and running costs.
Both models use Hybrid. Fuel economy is Q8 — 19.0 mpg; X7 — 18.0 mpg. Q8 uses less energy in everyday driving.
The final choice is about more than numbers: annual distance, city or highway use, and the space your household needs all matter. Use the CarPayCheck.com calculator to apply your financing terms and evaluate both cars in your situation.
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