BMW X3 G01 Specs and Maintenance: Every Engine, Fluid Interval, and Brake Size (2018–2024)
The G01 is the third-generation X3, built on BMW's CLAR platform with drivetrain parts from the G20 3-Series, suspension from the G30 5-Series, and interior switches from the G12 7-Series. Production began in 2017, sold as a 2018 model in the US, and the G45 replaced it for 2025. It is a five-door compact luxury SUV with five seats and 28.7 cu ft of cargo (63.7 cu ft with the seats folded). Every number below comes from the X3 G01 guide's Stock Specs, Engine Maintenance, Brakes, and Tires and Wheels tabs.
The engines
| Engine | Years | Output | Notes |
|---|---|---|---|
| sDrive20i / xDrive20i (B48) | 2018–2024 (international) | 2.0L turbo I4, 184 hp @ 5000 rpm; 214 lb-ft @ 1,350–4,250 rpm | Base international engine; 0–100 km/h 8.4 s; not sold in the US |
| sDrive30i / xDrive30i (B46/B48) | 2018–2024 | 2.0L turbo I4, 248 hp @ 5200 rpm; 258 lb-ft @ 1,520–4,800 rpm | US cars use the B46 (SULEV) variant; 0–100 km/h 6.6 s (sDrive) / 6.4 s (xDrive); twin-scroll turbo, Valvetronic, Double-VANOS, direct injection |
| X3 M40i (B58) | 2018–2019 | 3.0L turbo I6, 355 hp @ 5,500–6,500 rpm; 369 lb-ft @ 1,520–4,800 rpm | First M Performance X3; 0–100 km/h 4.9 s; closed-deck block, 11.0:1 compression, chain-driven cams, ~6.5 L oil capacity |
| X3 M40i (B58TU) | 2020–2024 | 3.0L turbo I6, 382 hp @ 5,800–6,500 rpm; 365 lb-ft @ 1,520–4,800 rpm | Technical Update: 25% lighter turbo impeller, twin-scroll turbo integrated into the steel exhaust manifold; 2022+ adds a 48V 11-hp mild-hybrid starter-motor |
| X3 M / Competition (S58, F97) | 2020–2024 | 3.0L twin-turbo I6, 473 hp; Competition 503 hp; 443 lb-ft | First full-M X3 (chassis code F97, the M sibling of the G01); 0–100 km/h 4.0 s / 3.7 s Competition |
| xDrive30e PHEV (B48 + motor) | 2020–2021 (US) | 2.0L turbo I4 + electric motor: 248 hp system, 282 hp with eBoost; 310 lb-ft | Plug-in hybrid; ~18 miles electric range (US); discontinued after 2021 |
| Diesels (international) | 2018–2024 (not US) | B47 2.0L diesels (~190 hp); B57 3.0L diesels (xDrive30d, M40d) | Europe/Asia only; the 20d is the volume diesel |
Transmission, drivetrain, and suspension
The only transmission on the G01 is the ZF 8HP Steptronic eight-speed automatic — no manual was offered. xDrive intelligent all-wheel drive is standard, using an electronically controlled multi-plate clutch (ATC13) to vary torque front to rear; the rear-drive sDrive30i joined the US lineup for 2019. Suspension is a double-pivot MacPherson strut front and a five-link rear, with adaptive Dynamic Damper Control optional; the M Sport package adds sport tuning.
The maintenance intervals
- Engine oil, B48/B46: BMW Longlife-12 0W-30; factory condition-based interval, but enthusiasts change at 5,000–7,500 miles. Avoid extended intervals and aggressive high-RPM use on old oil — the B48's timing chain and turbo live on clean oil.
- Engine oil, B58: 0W-20 / 0W-30 / 5W-30 meeting BMW spec; capacity about 6.5 L. Same 5,000–7,500-mile enthusiast interval; the B58 is tolerant but not immortal.
- Spark plugs: platinum-tipped; replace every 100,000 miles per BMW. Tuned B58s want shorter plug intervals (ask your tuner). Misfire under boost on a tuned car means plugs and coils first.
- Automatic transmission fluid: BMW says 100,000 miles; specialists recommend 60,000–80,000 miles with filter. "Lifetime fluid" is marketing — ZF itself recommends about a 60,000-mile service.
- Transfer-case fluid: BMW DTF-1; change every 60,000 km (about 37,000 miles). The single most effective xDrive maintenance item — degraded fluid causes the low-speed shudder (SIB 27 02 20). Recalibrate with ISTA after the change.
- Differential fluid, front and rear: 75W-90 synthetic gear oil; 60,000-mile enthusiast interval. Cheap insurance alongside the transfer-case service.
- Coolant: BMW blue (G48-type); long-term rating per BMW, but enthusiasts flush at about 60,000 miles / 4 years. Never mix coolant types. Critical on B48/B58 cars given the oil filter housing and pump issues — keep the level topped and watch for residue.
- Brake fluid: DOT 4; flush every 2 years per BMW. Non-negotiable with DSC/ABS modulators and the electric parking brake.
- Oxygen sensors: replace every 120,000 miles per BMW (150,000 miles under the California emissions warranty). Lazy sensors cost fuel economy long before they throw codes.
- Air and cabin filters: engine air about 30,000 miles; cabin microfilter about 30,000 miles / 2 years. Dealer cabin-filter pricing is steep — a 10-minute DIY.
Brakes: standard vs M Sport
Four-wheel discs with ABS and DSC and an electric parking brake, standard across the range. Standard brakes run 330 mm front rotors; M Sport brakes run 348 mm front rotors with blue calipers and 345 mm rears, standard on the M40i and optional on the 30i. The two systems do not interchange by rotors alone — the complete M Sport set is rotors, pads, and calipers (standard 330x24 mm vs M Sport 348x36 mm). Minimum thickness is 34 mm front (36 mm new); rears are 22 mm thick. When servicing, replace the wear sensors with the pads, and put the electric parking brake in service mode via the iDrive or diagnostic tool before retracting the rear calipers.
Wheels and tires: the 5x112 break
The critical G01 fitment fact: BMW moved the X3 from 5x120 to 5x112 with the G01, with a 66.6 mm hub bore. E83 and F25 wheels physically do not bolt on. The same 5x112/66.6 pattern is shared with the G20 3-Series, G30 5-Series, and G05 X5, so those wheels fit — but verify width, offset, and M Sport brake clearance. Factory wheels run 18/19/20/21 in, and most trims ship square; staggered 20s appear on M Sport cars. Owner consensus in the guide's how-to links calls the 19-inch square setup the sweet spot on the M40i (rotation, tire cost and selection, less unsprung weight), with the 20s sharper-looking and the 21s ruled out on replacement-tire cost. Run-flat tires are standard on most trims with a mobility kit instead of a spare; some North American builds got a space-saver spare, so check the trunk. And the xDrive tire rule, again: all four tires the same brand, size, and wear level, replaced in sets of four.
Where to learn the jobs
The guide's How-To Links tab covers the hands-on work: the oil service light reset (BC button through the menus to ENGINE OIL, hold to RESET, confirmed for the full G01 run), the B46 oil filter housing DIY thread (intake manifold and DME removal, new manifold O-rings, housing gasket torqued to 8–10 Nm), the M Sport brake retrofit thread (330x24 vs 348x36, complete set required, no coding needed), the B58 tuning guide (stages 1–3 for the M40i, software-only stage 1 first), and the FCP Euro G01 deep dive for buying research. The guide also carries a Lift Kits tab: a RisingTuning leveling kit (30 mm front / 25 mm rear spacers, stock struts retained) at $195 as listed, for cars without air suspension.
Open the full interactive BMW X3 G01 guide for the complete stock specs, engine maintenance table, brakes, tires and wheels, lift kits, and how-to links.
Compiled from the Cerch Garage BMW X3 G01 guide (Stock Specs, Engine Maintenance, Brakes, Tires and Wheels, and How-To Links tabs). Prices and costs are as listed in the guide and change; verify before buying anything. What this page does not cover: wheel lug torque specs and the B48's oil capacity. The guide does not state those, so they are left out rather than guessed.