2018 to 2024SUVM Performance
Photo: Kevauto, CC BY-SA 4.0, via Wikimedia Commons
The G01 X3 M40i was the first M Performance X3, built in South Carolina and sold here from 2018 to 2024 with the B58 3.0-liter turbo six, an eight-speed automatic and all-wheel drive.
Each part is scored from 0 to 100 on a fixed outside scale. Acclaim comes from published expert lists, launch reviews and awards; the more acclaimed a car, the less its ownership cost counts in this all-time score (its dollars below are unchanged). A part marked not measured carries no weight for this car, and the others share its weight.
11 prices from sources that allow this use (driveway.com), read October 27, 2026: the middle one is $32,683, about 58% of the price new (45% once the price new is put in today's dollars). Asking prices sit above what cars sell for.
Long-term value starts to count in the score once 75% of the 69 generations have permitted prices. Today 43 do.
About $2,347 a year to own ($1,453 to $3,567), about $10,554 over five years, bought at five years old or its own age if older, kept five years.
Expect about $1,500 to $3,600 a year; the bills that decide it are oil filter housing and valve cover gasket leaks and rear differential mounting bolt. Ownership risk: moderate.
Guide Score method v5-final.14, an editorial score built only from permitted, sourced data. How it works.
Colors it came in, most wanted first. Pick one to see the page in it.
2021The best year to buy, reading 62 of 100, about $2,347 a year to own.
From our log of the changes between model years, each with its source. Only changes the score reads count as reasons; recalls BMW fixes for free, options and tuning notes do not. The cost a year is for a car bought at five years old, or its own age if older, kept five years. How the score works.
It made 355 hp for 2018 and 2019 and 382 hp from 2020, and the 2022 update brought a facelift and a 48-volt mild-hybrid system.
It is one of the easiest M Performance models to shop, with about 670 for sale on CarGurus in May 2026, and a car up to five years old with under 60,000 miles can be sold as BMW Certified. The known fault to check for is the engine oil pump on 2020 and 2021 cars; the rear differential bolt that troubles the X3 M is rarely reported on this car.
Also check whether the crankcase valve (2018 and 2019 cars) and the EVAP purge valve are covered by BMW's 15-year warranty extensions, and look for oil filter housing leaks, the subject of a proposed 2026 class action.
What goes wrong on this generation, roughly what a fix costs at an independent shop, and how to spot it before you buy.
Ask about low-coolant warnings and top-ups, and look for dried coolant around the expansion tank and hoses with the engine cold.
NHTSA files some of this car’s recalls and owner complaints under the X3, so they are missing here. Check recalls by VIN, and read complaints by year, make and model, at nhtsa.gov/recalls.
The B58's coolant expansion tank can crack at its seams, and hoses and fittings around the engine can seep, so the loss is often slow: a low-coolant warning now and then. RepairPal puts a new tank at about $460 to $520.
Ask about low-coolant warnings and top-ups, and look for dried coolant around the expansion tank and hoses with the engine cold.
The plastic oil filter housing and its gaskets can leak oil or coolant, often from about 60,000 miles, and the valve cover gasket can weep. A proposed class action filed in January 2026 covers 2014 to 2021 X3s and X4s among other BMWs with this engine family (2018 to 2021 X3s are in the proposed class); BMW has moved to dismiss it, and no class has been certified. Both jobs take many hours of labor.
Look for oil or coolant residue at the oil filter housing and the valve cover, and ask about coolant top-ups.
The crankcase ventilation (PCV) valve's diaphragm can split, bringing blue-white smoke after a cold start, a whistle at idle and cylinder 6 misfire codes. BMW covers the valve for 15 years or 150,000 miles on X3 M40is built July 2017 to July 2019 (SI B01 14 23).
Ask whether the valve was replaced under SI B01 14 23; within 15 years and 150,000 miles a BMW dealer fixes it free.
On the X3 M, the bolt through the rear differential's rubber mount is a known weak spot that can bend or snap. On this car it is rarely reported: one owner complaint to NHTSA describes a sheared differential mounting bolt on a 2019 X3 sDrive30i, and none of the 107 complaints filed for X3 M40is mentions it. If it does fail, it starts as a clunk and can end with a broken driveshaft and a damaged differential; an X3 M owner put that repair at nearly $5,000.
Listen for a clunk from the rear when shifting between drive and reverse and when going on and off the throttle at low speed, and ask whether the bolt has been replaced.
Certain 2020 X3 M40is were recalled (NHTSA 21V598000) because the engine software could cut brake assist while the engine starts. The brakes still work but need a much harder push. Dealers update the software free of charge.
On a 2020 car, run the VIN through NHTSA or a BMW dealer and ask for proof the update was done.
The B58's variable oil pump has a plastic ring inside that can crack, and oil pressure then becomes erratic or is lost, which can ruin the engine. BMW specialist BRR Performance says it affects the updated engine (B58TU) built from 2018 to 2022, most often after extreme cold or with oil thicker than the specified 0W-20, that BMW moved to a metal ring in 2022 engines, and that the first version of the engine does not seem to fail this way. The X3 M40i got the updated engine for 2020 (BMW's 2019 product guide lists the first version), so the risk sits with 2020 and 2021 cars and some early 2022 cars. Of the owner complaints to NHTSA that mention the pump, 17 are on 2020 and 2021 X3 M40is, many of them copies of one 2026 letter, and four on 2018 and 2019 cars. RepairPal puts the job at about $2,100 to $2,800 at an independent shop, and dealers quote more.
Run the oil level check in iDrive. On 2020 and 2021 cars a check that stalls at 15 to 30 percent is usually a software fault BMW fixes with an update (SIB 11 04 26), so ask whether the update was done and, if the check still will not finish, have a BMW dealer or specialist check the oil pressure. Ask for an invoice if the pump has been replaced, and treat low oil pressure warnings in the history as a reason to walk away.
None returned by NHTSA under this car’s own name for the 2018 to 2024 model years.
NHTSA files some of this car’s recalls under the X3, so they are missing here. Check yours by VIN at nhtsa.gov/recalls.
Live from NHTSA, across the 2018 to 2024 model years.
Our estimates at an independent shop, parts and labor; fuel from the EPA.
Pricing tires for this car? Compare the factory sizes at Discount Tire, and ask a local shop to match it.
Fuel from EPA fueleconomy.gov: its yearly cost is for 15,000 miles with 55% city driving, moved here to the miles a year the two-year budget uses. The rest are our estimates at independent-shop and retail prices from September 2026. Service is a year of routine maintenance at 10,000 miles: one or two oil changes, brake fluid, filters, and spark plugs spread over their interval. Repairs are separate. Tires are a mounted set of summer tires; brakes are pads and rotors on both axles. Prices vary by region and shop.
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The cars this one gets weighed against, by lineage and by price.
The first M Performance X3: the B58 turbo six at 355 hp, then 382 hp from 2020, with an eight-speed automatic and xDrive. The 2022 update added a 48-volt mild hybrid.
Renamed the X3 M50: the six with a 48-volt mild hybrid at 393 hp, and the M Sport Differential standard.
Head to head: X3 M40i vs X3 M.
The M Index, once a month: any change to the X3 M40i's guide or score, with the reason, new recalls on M cars, and one thing to check before you buy.