Crocodile Locomotive (4551-1) is a 9V LEGO set released in 1991 with 314 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing 9V sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 1 minifigure and 91 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
1991 (35 years ago — may be retired)
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Catalog scale
314 parts listed · 91 inventory lines tracked
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Minifigures
1 in this set's inventory — verify completeness when buying used
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Build manual
No digital manual in our catalog — check the box tab or LEGO.com
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~556 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
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Minifigures in Crocodile Locomotive
Parts in this set
91 parts · page 1 of 2 · updating…
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Bracket 2 x 2 - 2 x 23956 · ×1 · Black -
Brick 1 x 13005 · ×10 · Red -
Brick 1 x 23004 · ×3 · Black -
Brick 1 x 23004 · ×12 · Red -
Brick 1 x 43010 · ×1 · Black -
Brick 1 x 43010 · ×6 · Red -
Brick 1 x 63009 · ×2 · White -
Brick 1 x 63009 · ×2 · Red -
Brick 2 x 23003 · ×2 · Red -
Brick 2 x 23003 · ×1 · Black -
Brick 2 x 43001 · ×2 · Red -
Brick 2 x 43001 · ×1 · Light Gray -
Brick 2 x 43001 · ×2 · Black -
![Brick Curved 2 x 4 x 2 Double [Plain]](https://cdn.rebrickable.com/media/parts/ldraw/4/4744.png)
Brick Curved 2 x 4 x 2 Double [Plain]4744 · ×2 · Red -
Brick Round 1 x 1 with Fins, Open Stud4588 · ×1 · Black -
Brick Sloped 33° 3 x 23298 · ×1 · Black -
Brick Sloped 45° 2 x 2 Double Convex3045 · ×2 · Black -
Brick Sloped 45° 2 x 2 with 3 Gauges and 3 Knobs Print3039pr9970 · ×1 · Black -
Brick Sloped 45° 2 x 43037 · ×2 · Black -
Brick Sloped 45° 2 x 6 x 2/32875 · ×4 · Light Gray -
Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin3747a · ×2 · Black -
Brick Sloped Inverted 45° 2 x 13665 · ×2 · Red -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/366026.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×4 · Black -
Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed4871 · ×1 · Black -
Brick Special 1 x 1 with Headlight4070 · ×4 · Red -
Brick Special 1 x 2 with Grille2877 · ×4 · White -
Brick Special 1 x 2 with Grille2877 · ×24 · Red -
Brick Special 1 x 2 with Grille2877 · ×8 · Light Gray -
Brick Special 2 x 4 x 2 with Studs on Sides2434 · ×2 · Black -
![Brick Wedged, Sloped 45° 6 x 6 Double / 33° [Train Roof End]](https://cdn.rebrickable.com/media/parts/ldraw/7/2876.png)
Brick Wedged, Sloped 45° 6 x 6 Double / 33° [Train Roof End]2876 · ×2 · Light Gray -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/458926.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×1 · Black -
![Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]](https://cdn.rebrickable.com/media/parts/elements/347526.jpg)
Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]3475b · ×2 · Black -
Equipment Control Panel2342 · ×1 · Black -
Glass for Train Door Lip On Top and Bottom4183 · ×4 · Trans-Clear -
Hinge Bar 2.5L with 2 and 3 Fingers on Ends (Pantograph Shoe Holder)2923 · ×4 · Black -
Hinge Tile 1 x 2 1/2 with 2 Fingers on Top4531 · ×2 · Light Gray -
Lever Small Base with Black Lever298c02 · ×2 · Light Gray -
Magnet Cylindrical73092 · ×2 · Black -
![Minifig Head [Plain] [Blocked Open Stud]](https://cdn.rebrickable.com/media/parts/ldraw/0/3626b.png)
Minifig Head [Plain] [Blocked Open Stud]3626b · ×2 · Black -
![Motor, Train Base, 9V [Complete Assembly]](https://cdn.rebrickable.com/media/parts/elements/70358.jpg)
Motor, Train Base, 9V [Complete Assembly]70358 · ×1 · Black -
Plate 1 x 104477 · ×4 · Red -
Plate 1 x 23023 · ×7 · Black -
Plate 1 x 23023 · ×26 · Red -
Plate 1 x 23023 · ×6 · Light Gray -
Plate 1 x 43710 · ×5 · Black -
Plate 1 x 43710 · ×4 · Red -
Plate 1 x 43710 · ×2 · White -
Plate 1 x 63666 · ×1 · Black