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2018 BMW 340i xDrive

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 340i xDrive.

Transmission Automatic (S8)

The 2018 BMW 340i xDrive is EPA-rated at 21/31/25 mpg city/highway/combined.

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Lug nut torque103 ft-lbsOEM · verified
EPA fuel economy21/31/25 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 48 · 760 CCA battery, OE oil filter 11428583896. 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.

Battery groupBCI 48 · 760 CCAOEM · verified
Tire sizeP225/40R18OEM · verified
Wheel / rim8.0; Optional: 8.0; Front Optional: 8.0; Rear Optional: 8.5; Front Optional: 8.0; Rear Optional: 8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter11428583896 alt 11428583897
Engine air filter13718632502
Spark plug12120040551
Battery61216806755 alt 61216805461
Front wiper blades61615A43585
Cabin air filter64116821995 alt 64119237555

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S8)

Dimensions & weight NHTSA vPIC

Overall length182.3 in
Overall width71.3 in
Overall height56.3 in
Wheelbase110.6 in
Curb weight3821 lb
Track (front / rear)60.6 / 62.2 in
Weight distribution (front / rear)52/48

Ratings & economy EPA / vPIC

EPA city / highway / combined21 / 31 / 25 mpg
DrivetrainAll-Wheel Drive
Passenger volume96 cu ft
Cargo volume13 cu ft
Recommended fuelPremium Gasoline

Service quick specs OEM factory data

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 oil drain plug to 20.0 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.

Lubricants & capacities

Brake FluidDOT 4
Clutch FluidDOT 4

Engine torques

Crankshaft Position (CKP) Sensor Bolt(s)9.0 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)7.4 ft-lbs
Oxygen (O2S) Sensor Bolt(s)35.0 ft-lbs
Knock Sense (KS) Bolt(s)16.0 ft-lbs
Nitrogen Oxide (NOX) Sensor Bolt(s)33.0 ft-lbs
Oil Pan to Block Bolts9.0 ft-lbs
Engine Oil Pan Drain Plug20.0 ft-lbs

Chassis torques

Lug Nuts103 ft-lbs

Ignition

Cylinder Firing Order1-5-3-6-2-4

Battery & A/C

Standard BCI Group Number48
Standard BCI Cranking Performance760 cca
Optional BCI Group Number94R
Optional BCI Cranking Performance800 cca

Service checks

RPM725.0

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
130.0 ft. lbs., Step 2: 120 degrees. Replace Screws30 ft. lbs
Cylinder Head — tightening sequence 10 stages

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.

113mm size head bolts22 ft. lbs
213mm size head bolts37 ft. lbs
313mm size head bolts90 degrees
413mm size head bolts90 degrees
513mm size head bolts90 degrees
613mm size head bolts90 degrees
711mm size head bolts22 ft. lbs
811mm size head bolts90 degrees
911mm size head bolts90 degrees
1011mm size head bolts90 degrees

Factory maintenance schedule OEM · verified

This vehicle uses condition-based service — it signals maintenance needs through its onboard service indicator rather than fixed mileage intervals. Items on the factory schedule:

ReplaceEngine Oil Filter · Spark Plugs · Engine Oil · Cabin Air Filter · Engine Air Filter Element
InspectWindshield Washer System · Body Water Drains · Underbody · Brake Line · Tire Repair Kit Sealant · Disc Brake Caliper · Brake Rotor · Air Bag System
Road testUniversal Vehicle Operation
Inspect Fluid LevelEngine Coolant System
ResetTire Pressure Monitoring System
Drain, Refill & BleedBrake Hydraulic System

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific 340i xDrive. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 48 batteryEngine oil filter 11428583896Engine air filter 13718632502Spark plug 12120040551Battery 61216806755

Reference guides

Cross-vehicle references for the kinds of data on this page.

OBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

What gas mileage does the 340i xDrive get?

EPA figures are 21 city / 31 highway / 25 combined mpg.