Factory build sheet

2018 BMW M4 Coupe RWD

Build WBS4Y9C5-J · 3L 6cyl · Rear-wheel drive · Coupe

VIN positions 1 through 8 read WBS4Y9C5 and position 10 reads J. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.

Every M4 whose VIN starts WBS4Y9C5 and carries J in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 1,698 of them.

  • Decoded Jul 7, 2026
  • 1,698 known VINs
  • 48 listed for sale now

Factory specification

As filed by BMW with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.

Engine

Displacement
3 L
Cylinders
6
Engine model
425 hp 3l i6
Horsepower
425 hp
Fuel type
Gasoline

Drivetrain

Drive type
Rear-wheel drive
Transmission
Manual/Standard
Forward speeds
6

Body & chassis

Body class
Coupe
NHTSA body type
PASSENGER CAR
Doors
2
Seats
4
Seat rows
2
Series
4-Series
Manufacturer
BMW M GMBH

Weight rating

GVWR class
Class 1
GVWR
6,000 lb or less

Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.

Driver assistance, as built

  • Forward collision warning Optional
  • Crash imminent braking Optional
  • Lane departure warning Optional
  • Adaptive cruise control Optional
  • Blind spot warning Optional

Systems the filing does not record are not listed above. Check the window sticker of the exact car before you rely on any single feature.

What this build asks today

Asking prices of live dealer listings decoded to this exact configuration — narrower than the trim-level figure, because every car counted here shares the same engine, transmission and drivetrain.

$47,426 median asking price · 64 listings · as of Aug 30, 2026

Low 2% of listings $30,995 Top 2% of listings $65,500

Compare every 2018 M4 trim and its price →

The same build, other model years

BMW used the VIN pattern WBS4Y9C5 for 2 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.

How this VIN pattern is read

A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.

Positions Characters What they encode
1–3 WBS BMW M GMBH · World manufacturer identifier
4–8 4Y9C5 Model, body style, engine and restraint system
9 × Check digit — computed per vehicle, not part of the build
10 J Model year — 2018
11 × Assembly plant
12–17 ×××××× Production sequence number, unique to each vehicle

1,698 vehicles carry this build

Every VIN we have decoded to WBS4Y9C5-J shares the specification above.

  • 1,698 Known VINs
  • 48 Listed for sale now
  • 64 Priced listings
  • $47,426 Median asking

Vehicles of this build

A fixed sample of 2 vehicles carrying this configuration — each with its own history page. The sample refreshes quarterly, not nightly, so it stays put between visits.

Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.

Browse all 1,698 VINs of this build →

Neighboring configurations

Other factory configurations of the M4, each with its own build sheet. The set is fixed by the VIN patterns themselves, so it does not shuffle as prices or inventory move.

Keep going

Where this data comes from

Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.

Prices are asking prices from 64 live dealer listings decoded to this build , last updated August 30, 2026 . They are what sellers ask, not what buyers paid.

Vehicle counts come from the 1,698 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.