Home › Models › G02 › Buyer's guide
BMW G02 X4 buyer's guide
2019–2025 · xDrive30i, M40i (B46/B48, B58)
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: G02. Not sure which one you have? The VIN check decodes year, model and engine.
Model-year changes
| Model year | What changed |
|---|---|
| Launch | Revealed February 2018; in North America the 2019 X4 went on sale in spring 2018 as xDrive30i or M40i.8 |
| 2019 | US lineup in the EPA listings: 2.0L 4-cyl turbo: X4 xDrive30i; 3.0L 6-cyl turbo: X4 M40i.9 |
| End | BMW indicated 2025 would be the final X4 model year.8 |
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
xDrive30i (2019–2025) · 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
M40i (2019–2025) · 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 17
Warranty extensions (13)
- SIB 01 09 21 Fuel tank leak check warranty extension Fuel tank leak check warranty extension on BMW G01/G02/G30/F97 and other models (2006–2023); BMW extended the warranty on this part for eligible cars. Warranty extension · Aug 2026
- 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 03 24 EVAP system warranty extension EVAP system warranty extension on BMW G01/G02/G05/G06 and other models (2017–2025); BMW extended the warranty on this part for eligible cars. Warranty extension · Jun 2026
- SIB 72 04 17 Seat warranty extension Seat warranty extension on BMW F90/G01/G02/G05 and other models (2016–2022); BMW extended the warranty on this part for eligible cars. Warranty extension · Jun 2025
- SIB 72 03 25 Seat warranty extension Seat warranty extension on BMW G01/G02 models (2018–2019); BMW extended the warranty on this part for eligible cars. Warranty extension · Jun 2025
- SIB 72 02 25 Seat warranty extension Seat warranty extension on BMW G01/G02/G20/F30 and other models (2019–2021); BMW extended the warranty on this part for eligible cars. Warranty extension · Jun 2025
- SIB 65 01 22 Air bags warranty extension Air bags warranty extension on BMW G01/G02/F26/F97 and other models (2006–2023); BMW extended the warranty on this part for eligible cars. Warranty extension · Jan 2025
- SIB 01 08 21 Fuel tank leak check warranty extension Fuel tank leak check warranty extension on BMW G01/G02/G05/G06 and other models (2020); BMW extended the warranty on this part for eligible cars. Warranty extension · Dec 2024
- SIB 31 01 24 Strut warranty extension Strut warranty extension on BMW G01/G02/G80/G81 and other models (2015–2024); BMW extended the warranty on this part for eligible cars. Service bulletin · Jan 2024
- SIB 01 14 23 Crankcase vent valve (PCV) warranty extension Crankcase vent valve (PCV) warranty extension on BMW G01/G02/G11/G12 and other models (2016–2021); BMW extended the warranty on this part for eligible cars. Service bulletin · Nov 2023
- SIB 01 12 19 Radiator warranty extension Radiator warranty extension on BMW G01/G02/G11/G12 and other models (2006–2023); BMW extended the warranty on this part for eligible cars. Service bulletin · Jun 2023
- SIB 54 03 20 Sunroof warranty extension Sunroof warranty extension on BMW G01/G02/G05/G06 and other models (2018–2021); BMW extended the warranty on this part for eligible cars. Service bulletin · Mar 2021
- SIB 32 05 20 Steering warranty extension Steering warranty extension on BMW G01/G02/F97/F98 models (2018–2021); BMW extended the warranty on this part for eligible cars. Service bulletin · Oct 2020
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 41 09 24 Delivery Stop Roof Frame Delivery Stop Roof Frame on BMW G02/F98 models (2024); unsold cars were held for inspection and repair before delivery. Service campaign · Nov 2024
- SIB 31 05 24 Front control arm new-car delivery hold Front control arm new-car delivery hold on BMW G01/G02/F97/F98 models (2024); unsold cars were held for inspection and repair before delivery. Service campaign · Nov 2024
- SIB 31 06 24 Front control arm new-car delivery hold Front control arm new-car delivery hold on BMW G01/G02/F97/F98 models (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 23
- 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 24V910: inner-left roof frame X4, 2025. The inner-left roof frame near the head air bag may have a crack that can damage the head air bag during deployment.
- 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 23V770: steering gear 230I, 330I, X3, X4, 2024. The steering gear may not have been tightened properly, which can allow it to loosen.
- Recall 23V211: front seat frame 330I, M340I, X3, X4, 2019–2021. The seat frame may not have been welded properly to the seat rails.
- Recall 22V070: transmission mechatronics unit 330I, 530I, X3, X4, 2022. The mechatronics unit inside the transmission may not have been assembled properly, which could result in an internal leak.
- Recall 21V831: rear license plate bracket X4, 2022. The rear license plate may not be illuminated properly.
- Recall 21V646: labels X4, 2022. The tire label may contain the wrong tire size and pressure information.
- Recall 21V598: engine management software 540I, 745LE, M340I, X3, X4, Z4, 2019–2021. During engine start, the engine management software may cause loss of braking assist.
- Recall 21V521: seat foam (including occupant classification sys) X3, X4, 2018–2019. The front passenger seat occupant classification system may have been improperly assembled, which could result in the misclassification of the seat as unoccupied, and deactivate the front air bag.
- Recall 21V199: fuel tank X3, X4, 2021. The inlet check valve weld may fail, allowing the filling pipe to separate from the fuel tank.
Showing the 12 newest of 23.
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.
G02 specs
BMW's US figures we have on file run from 248 hp (X4 xDrive30i) to 355 hp (X4 M40i), with 0-60 mph as quick as 4.6 s.
No manual gearbox appears in the EPA listings for this chassis. Full G02 specs: every US engine, transmission and drive by year →
Factory paint and option codes
Paint colors BMW of North America listed for the G02 in the ordering and pricing guides we read:
| Code | Color | Model years |
|---|---|---|
| 300 | Alpine White | 2019 |
| 416 | Carbon Black Metallic | 2019 |
| 475 | Black Sapphire Metallic | 2019 |
| 668 | Jet Black | 2019 |
| A83 | Glacier Silver Metallic | 2019 |
| A90 | Dark Graphite Metallic | 2019 |
| A96 | Mineral White Metallic | 2019 |
| C06 | Flamenco Red Metallic | 2019 |
| C07 | Dark Olive Metallic | 2019 |
| C1M | Phytonic Blue Metallic | 2019 |
| C1N | Sunstone metallic | 2019 |
93 option codes are listed for the G02 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 164 settings that owners can change on the G02 with a phone and an OBD adapter, in areas such as Seat heating/cooling, Head-Up Display, Display options instrument cluster, Convenient opening/closing, Display options iDrive system, Audio. 134 come from BimmerCode's list and 30 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 G02 maintenance schedule.
Repairs we price that apply to the G02
| 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 |
|---|---|---|---|---|
| 2019 | xDrive30i B46/B48 M40i B58 | 11 | 12 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2020 | xDrive30i B46/B48 M40i B58 | 11 | 12 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2021 | xDrive30i B46/B48 M40i B58 | 7 | 10 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2022 | xDrive30i B46/B48 M40i B58 | 5 | 6 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2023 | xDrive30i B46/B48 M40i B58 | 2 | 5 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2024 | xDrive30i B46/B48 M40i B58 | 2 | 2 | 7 Priciest: B58 valve cover / PCV failure, owners paid up to $4,450 (dealer, middle 50%) |
| 2025 | xDrive30i B46/B48 M40i B58 | 1 | 1 | 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 X4
- 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.