LEGO 6831 Message Decoder

Released 1989 · 34 pieces · 1 minifigure · Space · Space Police I

LEGO Message Decoder (6831) was released in 1989 in the Space · Space Police I line, with 34 pieces and 1 minifigure. It was one of 9 Space sets released that year (see them all). Released in 1989, 37 years ago, well past the two-to-three-year run most LEGO sets get, so it is almost certainly out of production.

Add to my collection

• Estimated value: $23 (modelled from piece count, era, and age, not live market data)

Availability: Likely retired (inferred from its release year, not an official retirement date)

Full details, the price breakdown, and the minifigures included are below. Add it to your collection to track what it's worth.

• 69¢ per piece, pricier per piece than most Space sets

Minifigures: Space Police I

More from 1989

Set data from the Rebrickable database, refreshed daily. Catalog data as of 2026-09-01. Values are this site's estimates, see how they're calculated.

Own this one? Create a free account to track your sets, see what your collection is worth, and build a wishlist others can buy from. No email needed.