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BMW G42 2 Series coupe buyer's guide
2022–present · 230i / 230i xDrive, M240i / M240i xDrive (B46/B48, B58)
Last updated
Engines by year Model-year changes Known problems Warranty extensions Recalls Inspection checklist Red flags Specs Coding Ownership costs Sources
Models and engines by year
US-market models. Chassis codes: G42. Not sure which one you have? The VIN check decodes year, model and engine.
Model-year changes
| Model year | What changed |
|---|---|
| Launch | Launch models included the 230i and the M240i xDrive (plus 220i and diesels outside the US).8 |
| 2022 | US lineup in the EPA listings: 2.0L 4-cyl turbo: 230i Coupe; 3.0L 6-cyl turbo: M240i xDrive Coupe.9 |
| 2023 | New: 230i xDrive Coupe (2.0L 4-cyl turbo), M240i Coupe (3.0L 6-cyl turbo).9 |
US model years unless noted. "LCI" (Life Cycle Impulse) is BMW's name for a mid-cycle facelift.
Known problems and when they show up
Mileages are what the cited shops, specialists and owner forums report. They are typical ranges, not predictions for any one car.
B46/B48 engine
230i / 230i xDrive (2022–present) · B46/B48 bulletins
| Problem | When it shows up | What to know | Repair prices |
|---|---|---|---|
| Coolant leak at the oil filter housing | most reports about 60,000–80,000 miles | BMW SIB 11 10 25 (Dec 2025): the housing seal can press on the coolant bushing so it deforms and leaks. The fix is a new gasket set and a redesigned bushing. It covers B46/B48 in G01, G02, G20, G22, G23, G26, G29, G30, G45 and G60.1,2,3 | B58 / B48 oil filter housing (coolant leak) Owners paid: indie shop $1,800–$3,300 · dealer $2,825–$3,950 |
| Brittle coolant hoses and couplings | age and heat related | Plastic connectors near hot parts crack and can burst.3,2 | No price yet |
| Turbo oil return line leak (early cars) | early production | Caused by a mis-assembled gasket, fixed under warranty on early engines.3 | No price yet |
| Fuel tank vent (purge) valve | any mileage | Evap check-engine light. BMW NA extended the warranty on this valve to 15 yr/150,000 mi on many B46/B48/B58 cars (SIB 01 02 24 and later; listed on our job page).4 | B58 / B48 fuel tank vent valve (purge valve) |
B58 engine
M240i / M240i xDrive (2022–present) · B58 bulletins
| Problem | When it shows up | What to know | Repair prices |
|---|---|---|---|
| Coolant loss: oil filter housing, vent hose, water pump, expansion tank | commonly from about 60,000–80,000 miles; water pumps typically last about 75,000–100,000 | Often a slow "ghost" leak you smell but can't see. A pressure test finds it. Common sources are the plastic oil filter housing and its coolant vent hose, the water pump and the expansion tank.5,2,6 | B58 / B48 oil filter housing (coolant leak) Owners paid: indie shop $1,800–$3,300 · dealer $2,825–$3,950 |
| Valve cover gasket and PCV | valve cover gaskets about 60,000–100,000 miles | Oil on the spark plugs, burning-oil smell, low-oil warning. In November 2023 BMW NA mailed owners a 15 yr/150,000 mi warranty extension for the crankcase pressure control (PCV) valve (details and letter on our job page).7,5 | B58 valve cover / PCV failure Owners paid: dealer $3,049–$4,450 |
| Fuel tank vent (purge) valve | any mileage | Evap check-engine light. BMW NA extended the warranty on this valve to 15 yr/150,000 mi on many B46/B48/B58 cars (SIB 01 02 24 and later; listed on our job page).4 | B58 / B48 fuel tank vent valve (purge valve) |
Warranty extensions and service campaigns 8
Warranty extensions (2)
- SIB 01 01 26 EVAP system warranty extension EVAP system warranty extension on B46/B48/B58 engines (2020–2025); BMW extended the warranty on this part for eligible cars. Warranty extension · May 2026
- SIB 66 07 25 Electrical system warranty extension Electrical system warranty extension on BMW G05/G06/G07/G09 and other models (2024); BMW extended the warranty on this part for eligible cars. Service bulletin · May 2025
Service campaigns (6)
- SIB 61 17 26 Seat cracking Seat cracking on BMW G42/G45 models (2026); BMW gives an adjustment procedure. Service campaign · Sep 2026
- SIB 63 01 26 Delivery Stop Rear Lights Delivery Stop Rear Lights on BMW G42 models (2026); unsold cars were held for inspection and repair before delivery. Service campaign · Jan 2026
- SIB 51 08 25 Body service campaign Body service campaign on BMW G42 models (2025); BMW repairs affected cars free under a service campaign. Service campaign · Apr 2025
- SIB 34 02 25 Coolant expansion tank leak Coolant expansion tank leak on BMW G20/G22/G23/G26 and other models (2025); BMW repairs affected cars free under a service campaign. Service campaign · Apr 2025
- NHTSA 11016435 Coolant expansion tank new-car delivery hold Coolant expansion tank new-car delivery hold on BMW G20/G22/G23/G26 and other models (2025); unsold cars were held for inspection and repair before delivery. Service campaign · Mar 2025
- SIB 18 01 24 Catalytic converter new-car delivery hold Catalytic converter new-car delivery hold on B46/B48 engines (2024); unsold cars were held for inspection and repair before delivery. Service campaign · Jul 2024
Filed by BMW with NHTSA. Extensions usually follow the car to later owners and can reimburse earlier repairs; a BMW dealer can confirm by VIN.
NHTSA safety recalls 5
- Recall 26V056: engine starter 230I, 330I, 430I, 530I, X3, X4, Z4, 2021–2024. Please see the recall report for a complete list of all models.
- Recall 25V636: engine starter 230I, 330I, 430I, 430I CONVERTIBLE, 530I, X3, X4, Z4, 2019–2022. The engine starter relay may corrode, causing the relay to overheat and short circuit.
- Recall 23V770: steering gear 230I, 330I, X3, X4, 2024. The steering gear may not have been tightened properly, which can allow it to loosen.
- Recall 23V099: digital key ECU software coding 230I, 840I, M2, M240I, M8, M850I, Z4, 2022–2023. BMW of North Americal, LLC (BMW) is recalling certain 2023 8 Series Coupe (840i, 840i xDrive, M850i xDrive, M8), 8 Series Convertible (840i, 840i xDrive, M850i xDrive, M8), 8 Series Gran Coupe (840i, 840i xDrive, M850i xDrive, M8, Alpine B8 xDrive), 2 Series Coupe (230i, 230i xDrive, M240i xDrive, M
- Recall 23V039: side air bag cover panel 230I, M240I, 2023. The second-row seat backrest cover panels for the side air bags may break during deployment of the side air bags.
Matched from NHTSA's public recall file by model and model year. A recall may cover only some cars from a year, and it may already have been done on yours. Check by VIN →
Test drive and inspection checklist
- Run the VIN for open recalls. Open safety recalls are free at any BMW dealer. Check on NHTSA's site or our recall page before you buy.10
- Scan for stored fault codes with a BMW-capable tool. A generic OBD reader misses most BMW modules. Specialist guides recommend a BMW-level scan (ISTA or similar) to catch faults that have been cleared from the dash but still stored.11,12
- Start it from cold. Ask the seller not to warm the car up first. Chain rattle, VANOS rattle, lifter tick and rough idle show most clearly in the first seconds after a cold start.11,13,14
- Ask a BMW dealer about warranty extensions and campaigns. Several BMW warranty extensions follow the car, not the owner, and some reimburse earlier repairs. A dealer can check the VIN. The list for this chassis is below.
- Get a pre-purchase inspection from a BMW specialist. A few hundred dollars for an independent BMW specialist is the usual advice, especially for M cars and high-mileage turbo engines.15,11
Engine items to listen and look for are in the known problems section.
Service-history red flags
- Oil changes only at the long computer interval. Several guides advise changing oil more often than the onboard service indicator (CBS) suggests, especially with lots of city driving.14,16
- Gaps in the records around known failure mileages. If the engine section below lists a job that usually comes due at the car's mileage, ask for the invoice. A missing record isn't proof it wasn't done, but it is a negotiating point.
- Tuned or "deleted" cars. Tunes, emissions deletes and removed parts complicate warranty claims and inspections and raise wear on turbo cars. Ask, and look for aftermarket intakes, downpipes and charge pipes.
- B46/B48: ask for records of Coolant leak at the oil filter housing; Brittle coolant hoses and couplings; Turbo oil return line leak (early cars); Fuel tank vent (purge) valve.
- B58: ask for records of Coolant loss: oil filter housing, vent hose, water pump, expansion tank; Valve cover gasket and PCV; Fuel tank vent (purge) valve.
G42 specs
BMW's US figures we have on file run from 255 hp (230i Coupe) to 382 hp (M240i xDrive Coupe), with 0-60 mph as quick as 4.1 s.
No manual gearbox appears in the EPA listings for this chassis. Full G42 specs: every US engine, transmission and drive by year →
Coding
The coding apps' own lists show 104 settings that owners can change on the G42 with a phone and an OBD adapter, in areas such as Seat heating/cooling, Display options instrument cluster, Display options iDrive system, Audio, Tailgate, Doors/windows. 104 come from BimmerCode's list.
Ownership costs
Routine maintenance: oil service prices by engine size, published BMW Value Service prices (brakes, spark plugs) from 16 US dealers, and the G42 maintenance schedule.
Repairs we price that apply to the G42
| Repair and owner-reported prices |
|---|
| B58 / B48 oil filter housing (coolant leak) Owners paid: indie shop $1,800–$3,300 · dealer $2,825–$3,950 |
| B58 valve cover / PCV failure Owners paid: dealer $3,049–$4,450 |
| B58 / B48 fuel tank vent valve (purge valve) |
| B58 coolant expansion tank (G05 X5 40i, high- or low-temp) |
| B58 heat management module (thermostat) replacement |
| B58 oil pump replacement Owners paid: indie shop $2,865–$3,600 |
| B58 water pump (coolant pump) |
"Owners paid" is the middle 50% of sourced owner prices across chassis with the same engine. Each job page reprices for your ZIP.
By model year
| Year | Models and engines | NHTSA recalls | Warranty extensions | Repairs we price |
|---|---|---|---|---|
| 2022 | 230i / 230i xDrive B46/B48 M240i / M240i xDrive B58 | 3 | 1 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2023 | 230i / 230i xDrive B46/B48 M240i / M240i xDrive B58 | 3 | 1 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2024 | 230i / 230i xDrive B46/B48 M240i / M240i xDrive B58 | 2 | 2 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2025 | 230i / 230i xDrive B46/B48 M240i / M240i xDrive B58 | 0 | 1 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2026 | 230i / 230i xDrive B46/B48 M240i / M240i xDrive B58 | 0 | 0 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
Recalls and warranty extensions are counted when their published model-year range includes that year. Each one may cover only some cars, so check by VIN. Repairs counted are the ones whose engine was offered that year.
Sources
- BMW SIB 11 10 25: coolant leaking from oil filter housing (B46/B48), via NHTSA
- Motronix: B46/B58 coolant leaks at the oil filter housing
- Bimmerly: B48 reliability
- BMW SIB 01 02 24: EVAP purge valve warranty extension (BimmerBench summary)
- BMWTuning: 5 most common B58 problems
- r/F30: high-mileage B58 coolant and OFH issues
- R44 Performance: B58 engine review
- Wikipedia: BMW 2 Series (G42)
- EPA/DOE fuel economy data (fueleconomy.gov)
- NHTSA recall lookup by VIN
- The Stable: E92 M3 buyer's guide
- Euro Premium Parts: E60 M5 reliability guide
- carsales: buying a used F30 3 Series (2015–20)
- carsales: buying a used E90 3 Series
- Road & Track: E46 M3 buyer's guide
- Drive-My: E60 5 Series buying guide (six-cylinder petrol)
Retrieved 2026-10-18. Bulletins and recalls come from NHTSA filings; owner prices come from the public posts linked on each job page.