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BMW G14 8 Series coupe, convertible and Gran Coupe buyer's guide
2019–present · 840i / xDrive, M850i xDrive (B58, N63 V8)
Last updated
Engines by year Model-year changes Known problems Warranty extensions Recalls Inspection checklist Red flags Specs Paint codes Coding Ownership costs Sources
Models and engines by year
US-market models. Chassis codes: G14, G15, G16. Not sure which one you have? The VIN check decodes year, model and engine.
Model-year changes
| Model year | What changed |
|---|---|
| Launch | Coupe unveiled June 2018, convertible launched November 2018, Gran Coupe on sale September 2019 (the first US 8 Series with a six-cylinder).9 |
| 2019 | US lineup in the EPA listings: 4.4L 8-cyl turbo: M850i xDrive Convertible, M850i xDrive Coupe.10 |
| 2020 | New: 840i Convertible (3.0L 6-cyl turbo), 840i Coupe (3.0L 6-cyl turbo), 840i Gran Coupe (3.0L 6-cyl turbo), 840i xDrive Convertible (3.0L 6-cyl turbo), 840i xDrive Coupe (3.0L 6-cyl turbo), 840i xDrive Gran Coupe (3.0L 6-cyl turbo), M850i xDrive Gran Coupe (4.4L 8-cyl turbo).10 |
| 2022 | New: Alpina B8 Gran Coupe (4.4L 8-cyl turbo).10 |
| End | BMW announced in autumn 2025 that the 8 Series would end without a replacement.9 |
| 2026 | No longer listed: Alpina B8 Gran Coupe.10 |
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.
B58 engine
840i / xDrive (2019–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.1,2,3 | 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).4,1 | 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).5 | B58 / B48 fuel tank vent valve (purge valve) |
N63 engine
M850i xDrive (2019–present) · N63 bulletins
| Problem | When it shows up | What to know | Repair prices |
|---|---|---|---|
| Oil consumption and valve stem seals | usually a higher-mileage problem; mostly the original N63 | Blue smoke on start-up or overrun, high oil use, oil-fouled plugs. BMW published a dedicated procedure and tool for N63TU/S63TU valve seals (SI B11 01 17).6 | N63 valve stem seals (oil burning / blue smoke) |
| N63 Customer Care Package items | any mileage; 2009–2014 cars | BMW's Customer Care Package (SIB 11 06 14) checks and replaces, as needed: air mass sensors, piezo injectors, vacuum pump, low-pressure fuel sensor and line, turbo intake seals and crankcase vent hoses. It lists F01/F02/F04/F07 to 6/2012, F10 to 7/2013, F12/F13 to 7/2012, E70 to 6/2013, E71 to 6/2014 and E72. Ask a dealer whether the VIN has had it.7 | No price yet |
| Turbo coolant lines, valve cover gaskets and timing chain | commonly 70,000+ miles | The heat of the "hot vee" layout ages rubber and plastic parts. The N63TU (from mid-2012 to 2013, by model) revised the timing chain, VANOS, crankcase ventilation and cooling.8,7 | N63 turbo coolant lines (coolant leak in the hot V) Owners paid: dealer $2,000–$3,202 |
Warranty extensions and service campaigns 9
Warranty extensions (5)
- SIB 01 15 24 Fuel tank leak check warranty extension Fuel tank leak check warranty extension on BMW G05/G06/G07/G11 and other models (2017–2020); BMW extended the warranty on this part for eligible cars. Warranty extension · Jul 2026
- 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 01 17 24 Fuel injectors failure Fuel injectors failure on N63/S63 engines (2015–2021); the fix is replacing the affected part. Warranty extension · Sep 2025
- SIB 01 01 21 Thermostat warranty extension Thermostat warranty extension on BMW G05/G06/G07/G11 and other models (2016–2022); BMW extended the warranty on this part for eligible cars. Warranty extension · Nov 2024
- SIB 32 02 23 Steering warranty extension Steering warranty extension on BMW G05/G06/G07/G11 and other models (2015–2024); BMW extended the warranty on this part for eligible cars. Service bulletin · Jan 2024
Service campaigns (4)
- SIB 84 02 26 Telematics unit failure Telematics unit failure on BMW G01/G02/G05/G06 and other models (2020); BMW repairs affected cars free under a service campaign. Service campaign · Jul 2026
- SIB 37 01 25 Strut new-car delivery hold Strut new-car delivery hold on BMW G14/G15/G16/G60 models (2024); unsold cars were held for inspection and repair before delivery. Service campaign · Jan 2025
- SIB 51 15 24 Unknown or other service campaign Unknown or other service campaign on BMW G14/G15/G16 models (2023–2024); BMW repairs affected cars free under a service campaign. Service campaign · Oct 2024
- SIB 17 03 24 Fuel injectors leak Fuel injectors leak on N63/S63 engines (2018–2022); BMW repairs affected cars free under a service campaign. Service campaign · Jun 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 10
- Recall 25V644: engine starter 740LI, 840I, X5, X6, X7, 2019–2025. After repeated attempts, the starter motor may overheat from an electrical overload.
- Recall 24V576: engine starter software 740I, 840I, M340I, M340XI, X5, X6, X7, 2019–2021. BMW of North America, LLC is recalling certain 2019-2020 X5, X7, 2020 3 Series Sedan, X6, 2020-2021 7 Series Sedan, 2020 8 Series Convertible, 8 Series Coupe, and 2020 8 Series Gran Coupe vehicles.
- Recall 23V821: integrated transmission control unit 4 SERIES, 8 SERIES, X3, X4, X5, X6, Z4, 2023. The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.
- 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 21V096: rearview camera software 330E, 330I, 430I, 530E, 530I, 540I, 740I, 745LE, 750LI, 840I, M340I, M440I, M550I, M760I, M8, M850I, X3, X4, X5, X6, X7, 2019–2021. When shifting into Reverse, a small portion of the rearview image may be obscured, or the screen may not illuminate.
- Recall 21V062: integrated brake system 740LI, 745LE, 750LI, 840I, M3, M4, M760LI, M8, M850I, X5, X6, X7, 2019–2021. The rotor and shaft within the integrated brake system may not have been welded properly and could separate during a hard braking event, possibly resulting in a loss of the Antilock Brake System (ABS) and braking assistance.
- Recall 20V761: n/a – vehicle assembly issue 530I, 540I, 740LI, 840I, M340I, M440I, X5, X6, X7, 2021. The connection between the 48-Volt battery and the starter-generator may not have been assembled properly, which can cause increased electrical resistance at the connections.
- Recall 20V164: pretensioner 330I, 840I, M340I, M8, M850I, X3, X4, 2020. The sensors in the front seat belt buckles may inaccurately detect a belted occupant as unbelted, possibly causing the air bag and seat belt pretensioners to deploy improperly in the event of a crash.
- Recall 19V684: camera 330I, 530E, 530I, 540D, 540I, 640I, 740LE, 740LI, 745LE, 750LI, 840I, M340I, M5, M550I, M850I, X3, X4, X5, X6, X7, Z4, 2018–2020. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse.
- Recall 19V513: engine 750I, M5, M850I, X5, X7, 2019–2020. The high pressure fuel pump may not have been properly attached to the engine, which may cause the fuel pump flange to crack, resulting in a fuel leak.
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.11
- 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.12,13
- 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.12,14,15
- 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.16,12
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.15,17
- 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.
- 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.
- N63: ask for records of Oil consumption and valve stem seals; N63 Customer Care Package items; Turbo coolant lines, valve cover gaskets and timing chain.
G14 specs
BMW's US figures we have on file run from 523 hp (M850i xDrive Convertible) to 523 hp (M850i xDrive Convertible), with 0-60 mph as quick as 3.8 s.
No manual gearbox appears in the EPA listings for this chassis. Full G14 specs: every US engine, transmission and drive by year →
Factory paint and option codes
Paint colors BMW of North America listed for the G14 in the ordering and pricing guides we read:
| Code | Color | Model years |
|---|---|---|
| 300 | Alpine White | 2021, 2026 |
| 416 | Carbon Black Metallic | 2021, 2026 |
| 475 | Black Sapphire Metallic | 2021, 2026 |
| A96 | Mineral White Metallic | 2021, 2026 |
| C1X | Sunset Orange Metallic | 2021 |
| C2Y | Bluestone Metallic | 2021 |
| C35 | Blue Ridge Mountain Metallic | 2021 |
| C36 | Dravit Grey Metallic | 2021, 2026 |
| C38 | Barcelona Blue metallic | 2021 |
| C3Z | Tanzanite Blue II Metallic | 2021, 2026 |
| X1C | (Ind) Aventurin Red Metallic | 2021 |
| X1D | Frozen Bluestone metallic | 2021 |
| C31 | Portimao Blue Metallic | 2026 |
| C4E | San Remo Green Metallic | 2026 |
| C4W | Skyscraper Grey Metallic | 2026 |
| C57 | Aventurin Red Metallic | 2026 |
| C5A | Frozen Pure Grey Metallic | 2026 |
| X1G | Frozen Tanzanite Blue Metallic | 2026 |
119 option codes are listed for the G14 in the same guides. Search them.
Only model years covered by the guides we could obtain are shown.
Coding
The coding apps' own lists show 152 settings that owners can change on the G14 with a phone and an OBD adapter, in areas such as Seat heating/cooling, Head-Up Display, Cleaning, Comfort Functions, Display options instrument cluster, Tailgate. 82 come from BimmerCode's list and 70 more appear only in Carly'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 G14 maintenance schedule.
Repairs we price that apply to the G14
| 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 |
| N63 valve stem seals (oil burning / blue smoke) |
| N63 turbo coolant lines (coolant leak in the hot V) Owners paid: dealer $2,000–$3,202 |
| N63 valve cover gaskets (both banks) |
| 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 |
|---|---|---|---|---|
| 2019 | 840i / xDrive B58 M850i xDrive N63 V8 | 6 | 4 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2020 | 840i / xDrive B58 M850i xDrive N63 V8 | 7 | 5 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2021 | 840i / xDrive B58 M850i xDrive N63 V8 | 5 | 4 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2022 | 840i / xDrive B58 M850i xDrive N63 V8 | 2 | 3 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2023 | 840i / xDrive B58 M850i xDrive N63 V8 | 3 | 2 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2024 | 840i / xDrive B58 M850i xDrive N63 V8 | 1 | 2 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2025 | 840i / xDrive B58 M850i xDrive N63 V8 | 1 | 1 | 10 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2026 | 840i / xDrive B58 M850i xDrive N63 V8 | 0 | 0 | 10 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
- BMWTuning: 5 most common B58 problems
- Motronix: B46/B58 coolant leaks at the oil filter housing
- r/F30: high-mileage B58 coolant and OFH issues
- R44 Performance: B58 engine review
- BMW SIB 01 02 24: EVAP purge valve warranty extension (BimmerBench summary)
- BMW SI B11 01 17: N63TU/S63TU valve seal replacement, via NHTSA
- BMW SIB 11 06 14: N63 Customer Care Package, via NHTSA
- BMWTuning: N63 vs N63TU vs TU2 vs TU3
- Wikipedia: BMW 8 Series (G15)
- 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.