Factory build sheet

2021 Toyota Avalon XLE AWD+DE-Content Package

Build 4T1KB1BB-M · 2.5L 4cyl · Four-wheel drive · Sedan

VIN positions 1 through 8 read 4T1KB1BB and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.

Every Avalon whose VIN starts 4T1KB1BB and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 75 of them.

  • Decoded Jul 7, 2026
  • 75 known VINs
  • 4 listed for sale now

Factory specification

As filed by Toyota 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
2.5 L
Displacement (CI)
152
Cylinders
4
Configuration
In-Line
Engine model
A25A-FKS
Engine manufacturer
Toyota
Valve train
Dual Overhead Cam (DOHC)
Horsepower
205 hp
Fuel type
Gasoline

Drivetrain

Drive type
Four-wheel drive

Body & chassis

Body class
Sedan/Saloon
NHTSA body type
PASSENGER CAR
Doors
4
Seats
5
Seat rows
2
Series
AXXA55L
Manufacturer
TOYOTA MOTOR MANUFACTURING, KENTUCKY, INC.

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 Standard
  • Crash imminent braking Standard
  • Lane departure warning Standard
  • Lane keeping assistance Standard
  • Adaptive cruise control Standard
  • Blind spot warning Standard

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.

$23,997 median asking price · 8 listings · as of Aug 30, 2026

Too few listings to publish a price range — with 8 cars on the market, the cheapest and the dearest are single cars, not a spread. The median above is what they ask in the middle.

Compare every 2021 Avalon trim and its price →

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 4T1 TOYOTA MOTOR MANUFACTURING, KENTUCKY, INC. · World manufacturer identifier
4–8 KB1BB Model, body style, engine and restraint system
9 × Check digit — computed per vehicle, not part of the build
10 M Model year — 2021
11 × Assembly plant
12–17 ×××××× Production sequence number, unique to each vehicle

NHTSA safety ratings

Crash-test results are published per model year and body style, so they cover the 2021 Toyota Avalon as a whole rather than this build alone.

Overall

★★★★★ 5 / 5

Frontal crash

★★★★ ★ 4 / 5

Side crash

★★★★★ 5 / 5

Rollover

★★★★ ★ 4 / 5

2 recall campaigns are recorded for the 2021 Avalon. Recalls are issued per VIN range — check the VIN of the car you are looking at, not the model.

75 vehicles carry this build

Every VIN we have decoded to 4T1KB1BB-M shares the specification above.

  • 75 Known VINs
  • 4 Listed for sale now
  • 8 Priced listings
  • $23,997 Median asking

Neighboring configurations

Other factory configurations of the Avalon, 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 8 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 75 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.