Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 X4.
The 2018 BMW X4 is an SUV equipped with an S8 automatic transmission that returns an EPA-estimated 18/25/21 mpg. Owner feedback for this specific year includes 11 total complaints primarily concentrated in the engine, engine cooling, and electrical systems, alongside a single recall. Contextualized within the X4's broader 2014-2026 complaint history—which peaks at 14 issues in 2020 and drops to a low of just 2 in 2024—the 2018 model's moderate figures position it as a relatively stable point in the vehicle's reliability trajectory for researchers to evaluate.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 94R · 800 CCA battery, OE oil filter 11428683168. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
| Engine oil filter | 11428683168 alt 11428637820 |
| Engine air filter | 13717571355 alt 13717601868 |
| Spark plug | 12120039664 alt 12120039634 |
| Battery | 61216806755 alt 61217635788 |
| Front wiper blades | 61612458017 |
| Thermostat | 11537586784 alt 11538635689 |
| Cabin air filter | 64119237159 alt 64319395930 |
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic (S8) |
| Overall length | 183.9 in |
| Overall width | 74 in |
| Overall height | 63.8 in |
| Wheelbase | 110.6 in |
| Curb weight | 4235 lb |
| Track (front / rear) | 63.8 / 64.2 in |
| Weight distribution (front / rear) | 51/49 |
| EPA city / highway / combined | 18 / 25 / 21 mpg |
| Drivetrain | All-Wheel Drive |
| Recommended fuel | Premium Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the X4 of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 2017 | M40i 3.0L Turbo I-6 | 4.40 sec | 13.10 sec | 355 hp | AWD |
| 2017 | M40i 3.0L Turbo I-6 | 4.90 sec | 13.60 sec | 355 hp | AWD |
| 2017 | xDrive28i 2.0L Turbo I-4 | 6.20 sec | 14.90 sec | 240 hp | AWD |
| 2015 | xDrive35i 3.0L turbo I-6 | 5.10 sec | 13.70 sec | 300 hp | AWD |
| 2015 | xDrive35i 3.0L Turbo I-6 | 5.20 sec | 13.80 sec | 300 hp | AWD |
| 2015 | xDrive35i 3.0L Turbo I-6 | 5.20 sec | 13.90 sec | 300 hp | AWD |
| 2015 | xDrive28i 2.0L Turbo I-4 | 5.90 sec | 14.60 sec | 240 hp | AWD |
| 2015 | xDrive28i 2.0L Turbo I-4 | 6.30 sec | 15.00 sec | 240 hp | AWD |
Capacities, torques and tune-up values from the factory service manual.
This engine DOT 4 brake fluid. Torque lug nuts to 103 ft-lbs. The firing order is 1-5-3-6-2-4. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
| Brake Fluid | DOT 4 |
| Clutch Fluid | DOT 4 |
| Crankshaft Position (CKP) Sensor Bolt(s) | 7.4 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 3.0 ft-lbs |
| Crankshaft Position (CKP) Sensor Bolt(s) | 9.0 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 7.4 ft-lbs |
| Camshaft Bearing/Carrier Cap Bolts or Studs | 108.0 inch lbs. ft-lbs |
| Camshaft Bearing/Carrier Cap Bolts or Studs | 72.0 inch lbs. ft-lbs |
| Oxygen (O2S) Sensor Bolt(s) | 35.0 ft-lbs |
| Knock Sense (KS) Bolt(s) | 18.0 ft-lbs |
| Lug Nuts | 103 ft-lbs |
| Cylinder Firing Order | 1-5-3-6-2-4 |
| Refrigerant | R134a |
| Refrigerant Capacity | 1.05-1.10 lbs |
| Oil Group | PAG |
| Oil Type | 46 |
| Standard BCI Group Number | 94R |
| Standard BCI Cranking Performance | 800 cca |
| Standard BCI Group Number | 49 |
| Standard BCI Cranking Performance | 850 cca |
| RPM | 725.0 |
| RPM | 725.0 |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 70 degrees | 70 degrees |
| 3 | 70 | |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 70 degrees | 70 degrees |
| 2 | 70 | |
Prep Do not reuse old bolts. Use new bolts coated with clean engine oil. Tighten all bolts to finger tight then continue on with the following procedure.
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
| 2 | 90 degrees. | 90 degrees |
| 3 | 180 degrees | 180 degrees |
Prep Do not reuse old bolts. Use new bolts coated with clean engine oil. Tighten all bolts to finger tight then continue on with the following procedure.
| 1 | Bolts 1-14 | 22 ft. lbs |
| 2 | Bolts 1-14 | 90 degrees |
| 3 | Bolts 1-14 | 180 degrees |
| 4 | M9 Bolts | 16.2 ft. lbs |
| 5 | M9 Bolts | 16.2 ft. lbs |
| 1 | 44.0 ft. lbs. | 44 ft. lbs |
| 2 | 45 | |
| 1 | 44.0 ft. lbs. | 44 ft. lbs |
| 2 | 45 | |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 90 | |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 70 | |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 2018 BMW X4 sits at a pivotal point in the model's federal record: it has 11 complaints and just 1 recall, which is notably lower than the 7 recalls on the 2019 and 10 on the 2020 model years. However, the 2018 also logged 81 TSBs, far fewer than the 159 of 2017 and the 269 of 2019, suggesting a dip in service bulletins before a sharp rise. The single investigation carried over from 2016-2018 ends after this year, and the complaint count is moderate but includes 2 crash and 1 fire reports, with the top issue area being Engine & Engine Cooling/Electrical System (5 complaints). Compared to the spike in recalls and TSBs that begins in 2019, the 2018 appears relatively stable, though it has more complaints than the preceding 2017 model (3 complaints). Overall, this is a reasonably good year to buy within the generation, as it avoids the high recall volume of later years while still benefiting from a lower TSB count than earlier or later models.
All 11 complaints on record, top 7 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 1 of 1 campaigns on record for this vehicle.
BMW of North America, LLC. (BMW) is recalling certain 2012-2015 X1 sDrive28i, X1 xDrive28i, 2012-2016 Z4 sDrive28i, 528i, 528i xDrive, 328i, 328xi, 2016-2018 X5 xdrive 40e, 2014-2016 228i, 228xi, 428i, 428i xDrive… Remedy: Dealers will inspect and replace the water pump and plug connector as necessary, and install a protective shield, free of charge. Owner notification letters were mailed on March…
Showing 5 of 81 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| B010324 | 2026-05-06 | Engine | The EVAP systems purge (vent) valve limited warranty for defects in materials or… |
| B661719 | 2025-04-30 | Service Brakes | The vehicle applies the brakes on its own when reversing onto an inclined roadway or… |
| B650122 | 2025-01-06 | Air Bags | The limited warranty for the Knee Air Bag wire harness repair cable procedure for defects… |
| B011524 | 2024-12-11 | Engine | the NVLD limited emissionrelated warranty for defects in materials or workmanship has… |
| B010921 | 2024-12-11 | Engine | The NVLD limited emission related warranty for defects in materials or workmanship has… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 18 city / 25 highway / 21 combined mpg.