2018 — 2026
sDrive30i (B48) - 2.0L High-output turbocharged
Petrol
Check the convertible roof operation while parked on level ground. | Note: While these mechanisms are generally reliable, it is common to listen for any unusual straining or hesitation in the motor as the roof cycles, which may indicate aging seals or hydraulic strain.
Pay attention to the 8-speed ZF transmission during low-speed gear changes. | Note: The ZF unit is a highlight of the G29, but in cars with higher mileage, you might observe if there is any hesitation when transitioning between first and second gear, which could suggest a future need for a transmission software update or fluid service.
Evaluate the condition of the front suspension bushings over uneven road surfaces. | Note: These cars feature a sophisticated suspension setup, and it is helpful to listen for any 'clunks' or 'thuds' that could signify that the bushings are beginning to show their age.
Inspect the front tires for uneven wear patterns after a short test drive. | Note: Due to the sporty alignment of the Z4, you might find that the inside edges wear faster; it is a good idea to ensure the car tracks straight on a flat road to avoid potential alignment issues.
Usually time to inspect the condition of the run-flat tires and ensure the brake pads have sufficient life.
A sensible time to consider a proactive transmission fluid flush, even though BMW calls it 'lifetime' oil.
Consider having the spark plugs replaced and checking the water pump, as these are common points of maintenance at this stage.
Keep up with the engine oil changes every 10,000-15,000km to keep the B48 engine running smoothly.
Ensure the cooling system fluid is topped up and checked during your standard annual service.
Regularly clean the drain holes near the convertible roof frame to prevent water accumulation.
Check the tire pressures frequently, as the Z4's performance handling is sensitive to even minor pressure drops.
Keep the cabin air filter replaced regularly to ensure the ventilation system stays fresh during top-down driving.
Estimated repair costs if issues arise
As the car clocks up more kilometers, the cooling components can eventually become tired. If this needs attention in the future, the job involves replacing the electric water pump and housing to maintain engine efficiency.
Depending on the road conditions the vehicle has faced, you might eventually need to budget for refreshing the front control arm bushings to restore that sharp, factory-fresh steering feel.
The G29 performs well and utilizes its brakes effectively; you should prepare for the eventual replacement of discs and pads to ensure optimal stopping power.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer