BMW M3 CS S-A (2018)
Running costs, common problems, and reliability data based on 111 real MOT tests in 2024.
MOT Pass Rate
100%
Total Tests (2024)
111
Avg Mileage
21,781 mi
Est. Annual Cost
£2,037
Is the 2018 BMW M3 CS S-A reliable?
Excellent reliability. Very few MOT failures. That's 18 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 6 years old, 100% of BMW M3 CS S-As from 2018 passed their MOT first time in 2024. That's based on 111 tests across the UK. The average mileage at this age is 21,781 miles.
How does the 2018 BMW M3 CS S-A compare?
Mileage Analysis
The average 2018 BMW M3 CS S-A has 21,781 miles on the clock, which is significantly below the expected 44,400 miles for a 6-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
How much does a 2018 BMW M3 CS S-A cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
Checking a specific BMW M3 CS S-A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 BMW M3 CS S-A
The 2018 BMW M3 CS S-A is a premium performance with a 2979cc petrol engine. 111 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 1% of all 2018 cars for reliability.
With an average of 21,781 miles at 6 years old, BMW M3 CS S-A owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2018 BMW M3 CS S-A Fuel Costs
The 2979cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 BMW M3 CS S-A?
Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 100% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2018 BMW M3 CS S-A
At 6 years old, the BMW M3 CS S-A offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Alternatives to the 2018 BMW M3 CS S-A
The BMW M3 CS S-A is actually the most reliable option among similar petrol premium performances from this era. Here are comparable petrol cars with similar engines:
- BMW 5 SERIES (2018) 91% pass rate (-9%) from 40,272 tests
- LAND ROVER RANGE ROVER SPORT (2018) 93% pass rate (-7%) from 34,257 tests
- BMW X3 (2019) 92% pass rate (-8%) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (-7%) from 30,341 tests