Retiring soonAges 14+

The Fire Knight Mech (71846)

Name: The Fire Knight Mech
Brand: LEGO
SKU: 71846

Prices last checked: 27 October 2026 at 19:56

LEGO.com4.9(4)Amazon4.8996 pieces · 7.1p each

Available From

Cheapest right now

£71.16€84.99

Amazon FR

Save £38.83

35% under £109.99 RRP

Go to Amazon FR

Delivery not known · priced in EUR, converted at the ECB rate of 23 Oct 2026

Its price range since we started watchingtoday is near the bottom

£73.77 lowest£110.00 highest

Also available

Amazon DE

€88.66 · Delivery not known

£74.24

£35.75 under RRP

Buy

Amazon UK

Free delivery

£87.95

£22.04 under RRP

Buy

Argos

Not re-checked since 13 May 2026

£110.00

LEGO.comOfficial

Sets the RRP everything else is measured against

£87.99

Buy

It was £73.77 at Amazon UK in August. Checked 49 times over 277 days · average £89.79.

Building Instructions Brickset

Price Analysis

Lowest Price Ever

£73.77

at Amazon UK · Aug 2026

Average Price (12mo)

£89.79

Current vs Average

-2.0%

Below average

Price Trend

Rising

Last 30 days

Best Month to Buy

August

Value Score

10.0/10

Price-per-piece vs theme avg

The lowest price we've recorded for The Fire Knight Mech is £73.77 at Amazon UK in August 2026. The current price is 2.0% below the 12-month average of £89.79. Prices have been trending upward recently. Consider buying soon if you spot a deal. Historically, August tends to offer the best prices for this set.

Price History & Buying Verdict

VerdictBuy now

•This set is marked as retiring soon by LEGO — once production stops, prices on the secondary market typically rise significantly.
•The current best price of £71.16 is within 5% of the all-time low we've recorded (£73.77 at Amazon UK, August 2026).
•Prices have been rising over the last 30 days, so locking in the current price could be wise.
•On price-per-piece, this is one of the better-value sets in the NINJAGO® range (value score 10.0/10 vs theme average).
•A recent price drop of about £7.84 was recorded in the last 30 days.

We've been tracking the price of LEGO NINJAGO® The Fire Knight Mech (996 pieces) for 277 days, recording 49 data points across LEGO.com and major UK retailers. Over that period the price has dropped 15 times below previous levels, with the lowest price ever recorded being £73.77 at Amazon UK in August 2026.

The 12-month average sale price for set 71846 works out to £89.79 — that's 18.4% below the LEGO RRP of £109.99. The highest price we recorded across our tracked retailers was £110.00, giving a range of about £36.23 between the cheapest and most expensive observation.

Amazon UK has run the most price drops on this set in the period we've tracked, making it the retailer most worth watching for short-term deals. Historically, August has produced the lowest average prices for The Fire Knight Mech, so if you're not in a hurry it's worth bookmarking the page closer to that window. Prices have been trending upward over the last 30 days, so the deals window may be closing.

Want to see how LEGO The Fire Knight Mech (set 71846) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.

Description

The Fire Knight Mech (71846) is a LEGO NINJAGO® set with 996 pieces, with an RRP of £109.99. It's currently available from £87.95 at Amazon UK, 20% below the RRP, saving £22.04. Amazon FR lists it for €84.99 (about £71.16 before delivery and any import costs). Prices have been rising recently, so acting sooner may be wise. With a value score of 10.0/10, this set offers excellent value compared to other NINJAGO® sets.

Older NINJAGO® fans aged 14 and up can add to their collection of LEGO® NINJAGO models with this stunning and highly detailed The Fire Knight Mech (71846) building kit. It features a dramatic scene of a cape-wearing, spear-holding mech locked in battle with an ancient monster emerging from the sea, and it will look great on display in a bedroom.

Ninja fans can also remove the model from its base to recreate stories from the NINJAGO Legends Monstrosity series. The mech has posable features and the sea monster has movable tentacles. The model also comes with 2 NINJAGO minifigures: Kai with a magical sword, who can be placed inside the mech’s chest, and a fisherman with a paddle in a boat.

The rest of the LEGO NINJAGO range of sets (sold separately) includes dragons, vehicles and temples for fans to role-play adventures with their heroes. Each ninja playset can be created with the LEGO Builder app, which guides you on an easy and intuitive building adventure. Set contains 996 pieces.

Features

NINJAGO® mech model – Older NINJAGO fans can add to their collection of LEGO® NINJAGO models with this highly detailed The Fire Knight Mech
Ninja display set – This dramatic scene depicting The Fire Knight Mech with a cape and spear locked in abattle with an ancient monster emerging from the sea can be displayed in your room
Interactive model – Ninja fans can remove the model from its base to stage stories from the NINJAGO® Legends Monstrosity series between the posable mech and a monster with movable tentacles
2 NINJAGO® minifigures – The model also includes ninja Kai with a blade, who can sit inside the mech’s chest, and a fisherman with a paddle in a boat to inspire extra storytelling
Premium gift for NINJAGO® fans – This modelis a high-quality gift idea for fans of NINJAGO Legends Monstrosity who want to showcase their fandom
A fun way to build – Let the LEGO® Builder app guide kids on an intuitive building adventure, where they can save sets, track progress and zoom in and rotate models in 3D while they build
A universe of ninja toys – LEGO® NINJAGO® sets let kids escape into a fantasy world of adventures with their ninja heroes
Measurements – The mech in this 996-piece building set stands over 10.2 in. (26 cm) tall when posed on the display stand with its spear

Minifigures Included

2 figures

Minifigures in The Fire Knight Mech.

Fisherman
5 parts
Kai (Master of Fire)
5 parts

Minifigure data from Rebrickable.

Frequently Asked Questions about The Fire Knight Mech

What is the best price for LEGO The Fire Knight Mech (Set 71846)?

The best current UK price for LEGO The Fire Knight Mech (Set #71846) is £87.95 at Amazon UK. This is £22.04 cheaper than the official LEGO RRP of £109.99. Price last verified on 27 October 2026.

How much can I save on LEGO The Fire Knight Mech?

You can save £22.04 (20% off) on LEGO The Fire Knight Mech by buying from Amazon FR instead of LEGO.com. The official RRP is £109.99, but you can get it for just £84.99. Browse more top discounts.

How many pieces are in LEGO set 71846?

LEGO The Fire Knight Mech (Set #71846) contains 996 pieces. At the best available price of £84.99, that works out to approximately 8.5p per piece.

What age is LEGO The Fire Knight Mech suitable for?

LEGO The Fire Knight Mech (Set #71846) is recommended for ages 14+. This set is part of the LEGO NINJAGO® theme. View all NINJAGO® sets and deals.

Where can I find the building instructions for LEGO The Fire Knight Mech?

You can download the official building instructions for LEGO The Fire Knight Mech (Set #71846) for free from LEGO.com. Download the building instructions here. The instructions are available as a PDF and can be viewed on any device.

Where can I buy LEGO The Fire Knight Mech in the UK?

LEGO The Fire Knight Mech (Set #71846) is available from 3 UK retailers including Amazon FR, Amazon UK, Amazon DE. Prices range from £71.16 to £87.95. It's also available directly from LEGO.com at £87.99.

Is LEGO The Fire Knight Mech on sale right now?

Yes! LEGO The Fire Knight Mech is currently 20% off on LEGO.com, reduced from £109.99 to £87.99. See more hot deals.

What is the lowest price ever recorded for LEGO The Fire Knight Mech?

The lowest price we've recorded for LEGO The Fire Knight Mech (Set #71846) is £73.77 at Amazon UK in August 2026. That's 33% off the LEGO RRP of £109.99. Track the latest movements on our LEGO price history page.

Is LEGO The Fire Knight Mech being discontinued or retiring soon?

Yes — LEGO The Fire Knight Mech is flagged as retiring soon by LEGO. Once production ends and remaining stock sells through, prices on the secondary market typically climb well above RRP. If this set is on your list, the safest window is now while retailers still have stock. Browse our list of retiring LEGO sets to see what else is on the way out.

Is LEGO The Fire Knight Mech good value for money?

Comparing piece-count to price across the LEGO NINJAGO® theme, this set scores 10.0 / 10 for value. That works out to about 8.5p per piece. That puts The Fire Knight Mech in the top tier of NINJAGO® sets for raw build value — you're paying noticeably less per brick than the theme average. Compare against other contenders on our best-value LEGO sets page.