Autoblog and Yahoo may earn commission from links in this article.This 2020 BMW M4 CS is one of the rarest and most focused versions of the F82 M4, a limited run of roughly 3,000 cars that slotted between the standard M4 and the extreme GTS. Finished in Alpine White with a carbon-fiber roof and hood, it makes 454 horsepower from the twin-turbo S55 and adds meaningful weight savings and chassis upgrades. At 57,000 miles with a few tasteful modifications, this is the CS as a car to drive rather than a garage-kept collectible, and it is priced accordingly.2020 BMW M4 CSBring a TrailerWhat it's worth right nowClassic.com shows the M4 CS ranging from a $34,000 low to an $85,824 high, reflecting how much mileage and condition move these limited cars. With just 3,000 built and a genuine step up in focus over the standard M4, the CS holds a clear premium over a regular F82, and the best low-mileage examples sit near the top of that range.AdvertisementAdvertisementThis car sits in the lower-to-middle portion of the CS market for specific reasons: at 57,000 miles it is one of the higher-mileage examples to come up, and it has been lightly modified with an aftermarket carbon front splitter, kidney grille surrounds, and a Project Gamma cold-air intake. Those are reversible changes, and importantly the seller includes the removed factory front splitter and intake components, so the car can be returned to stock.2020 BMW M4 CSBring a TrailerGiven the rarity and specification but accounting for the mileage and modifications, I would call fair value roughly $45,000 to $58,000. The current $40,004 bid with fourteen bids and four days remaining is climbing steadily and sits just below that range, and where it lands will depend on how bidders weigh the desirable CS pedigree against the higher mileage.Condition and detailsThe specification is the appeal. This is a genuine M4 CS in Alpine White with Shadowline trim, a carbon-fiber roof, carbon mirror caps, and a carbon-fiber-reinforced hood, riding on staggered 19- and 20-inch Style 763M wheels with blue M calipers. It has the Executive Package adding a head-up display, wireless charging, and a power sunshade, plus the lightweight CS door panels and pulls and heated M sport seats in leather and Alcantara. The twin-turbo S55 makes 454 horsepower through the seven-speed dual-clutch, and the car was bought Certified Pre-Owned by the current owner in 2023.2020 BMW M4 CSBring a TrailerFor condition, this is an honest, driven car. It has 57,000 miles, about 25,000 added under current ownership, and recent service including a February 2026 brake-fluid flush, two replaced tires, and a recent oil change. The modifications are cosmetic and bolt-on: the aftermarket splitter, which the seller confirmed is attached with 3M tape rather than drilled holes, the carbon grille surrounds, the Project Gamma intake, and a BlackVue dash cam. A commenter rightly noted that thorough documentation matters most on a modified car with this mileage, and the seller responded that all provided documents were sent to the auction platform with the balance of service history in the Carfax.2020 BMW M4 CSBring a TrailerThe diligence here is standard S55 practice plus attention to the miles. These engines are robust but benefit from documented maintenance, so review the service history carefully, confirm the dual-clutch transmission and cooling system are healthy, and factor in that a 57,000-mile performance car will need consumables sooner than a garage queen. Verify the modifications were professionally installed and that the factory parts are all present for a return to stock. The car is a dealer consignment through a BaT Local Partner, and a pre-purchase inspection is worth arranging.2020 BMW M4 CSBring a TrailerAdvertisementAdvertisementThe offerSpecificationDetailMakeBMWModelM4 CS (F82)Year2020Mileage57,000EngineTwin-turbocharged 3.0-liter S55 inline-sixPower454 horsepower, 442 lb-ftTransmissionSeven-speed M dual-clutch automaticDrive typeRear-wheel drive with Active M differentialExterior colorAlpine WhiteInterior colorBlack leather and AlcantaraCurrent bidUSD $40,004Interested in this car? View the listing here.What makes the M4 CS uniqueThe M4 CS, short for Competition Sport, occupied a special place in the F82 M4 lineup as a limited-production model that bridged the gap between the Competition Package cars and the hardcore, track-only GTS. Built in a run of roughly 3,000 worldwide, it took the twin-turbo S55 to 454 horsepower, shaved weight with carbon-fiber body panels and lightweight interior fittings, and added retuned adaptive suspension and a more aggressive setup for a sharper, more engaging drive. It kept enough daily usability to be a genuine road car while moving meaningfully toward the track focus of the GTS.2020 BMW M4 CSBring a TrailerThat combination of limited numbers, real weight savings, and a more focused character is why the CS has held a premium over the standard M4 and become a collectible in its own right. The market rewards low-mileage, unmodified, well-documented examples most, which places a driven, lightly modified, higher-mileage car like this one in the more accessible part of the CS range. For a buyer who wants to actually use a rare M4 CS rather than preserve it, that is precisely the appeal, and the included factory parts mean the option to return it to stock is always there.My takeThis is a genuine, rare M4 CS offered as an honest driver rather than a preserved collectible, and there is real appeal in a limited car you can use without fretting over every mile. My fair-value call is $45,000 to $58,000, reflecting the CS pedigree and Alpine White carbon-trimmed spec against the 57,000 miles and the bolt-on modifications. I would be comfortable in that range for a car whose service history checks out.AdvertisementAdvertisementThe buying advice centers on documentation and the modifications. Review the service records carefully given the mileage, confirm the S55, dual-clutch, and cooling system are healthy, and verify the aftermarket splitter, grilles, and intake were properly installed, with the included factory parts all accounted for if you want the option to return it to stock. Get a pre-purchase inspection. Handle those, and the current $40,004 bid is a fair starting point on one of the more usable ways into a limited-production M4 CS.Disclaimer: This post is for informational purposes only. We are not a dealership or broker. All vehicle specifications, pricing, and availability are subject to change without notice. We are not responsible for typographical errors, omissions, or the accuracy of the provided information. Please verify all details directly with the seller.Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.This story was originally published by Autoblog on Aug 14, 2026, where it first appeared in the Car Buying section. Add Autoblog as a Preferred Source by clicking here.
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