Land Rover Defender Coolant Type
Land Rover Defender coolant type by generation with JLR specification, capacity, and mix ratio.
Last updated: 2026-10-28 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
The modern Land Rover Defender (2020+) uses JLR STJLR.651.5003 coolant (pink OAT). Capacity is ~12-14L depending on engine. Mix 50/50 with distilled water.
| Generation | Years | Top spec |
|---|---|---|
| L663 (2020-2025) | 2020-2025 | JLR STJLR.651.5003 |
| Classic (1983-2016) | 1983-2016 | Ethylene glycol based (varies by year) |
This vehicle's factory manual
The spec is above. This opens the 2020 Land Rover Defender factory book. Use another year if yours is older.
Land Rover Defender maintenance schedule
Know the exact coolant type job for your Land Rover Defender
The modern Land Rover Defender (2020+) uses JLR STJLR.651.5003 coolant (pink OAT). Capacity is ~12-14L depending on engine. Mix 50/50 with distilled water.
Fluid type and capacity can change by engine, drivetrain, and transmission. Verify the exact branch before filling anything. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
The button opens the factory book for this vehicle. Use the engine picker only when your trim is not the one this page already matched.
L663 (2020-2025)
- →Also known as G12+ spec
- →Do NOT mix with green or universal coolant
Classic (1983-2016)
Manual already checked Amazon for you
You came here for the exact spec. Now here is the exact part — plus the two things people always forget and have to run back to the store for.
Land Rover Defender coolant
Get the exact coolant chemistry your Land Rover Defender needs. Wrong coolant = sludge and overheating.
We earn a small commission if you buy through these links — at zero extra cost to you. We only suggest items that match the factory specs on this page.
Coolant Service — Manual's Parts List
Flush or top-off — here is exactly what you need.
- 1Engine CoolantShop →
JLR STJLR.651.5003 — verify concentrate vs pre-mixed
- 2Distilled WaterShop →
If using concentrate — never use tap water
- 3Spill-Free FunnelShop →
Bleeds air from the heater core automatically
- 4Hose Clamp PliersShop →
Spring clamps are a pain without these
- 5Shop RagsShop →
Coolant is slippery — clean spills immediately
Get everything at once
One search shows all of the above on a single page.
Links go to Amazon via our affiliate store (aiautorepair-20). We earn a small commission at no extra cost to you — it keeps the site running and the data free.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Engine Coolant / Antifreeze
Match the color/spec (e.g. OAT, HOAT) to your car.
Spill-Free Funnel
The best way to bleed air from the cooling system.
Coolant Tester
Check the freeze and boil protection level.
Hose Clamp Pliers
Helps move spring clamps without mangling hoses.
Shop Towels
Cleanup gear for coolant drips and burps.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Land Rover Defender so the job is ready when the parts arrive.
Frequently Asked Questions
- What coolant does a Land Rover Defender use?
- 2020+ Defender uses JLR STJLR.651.5003 pink OAT coolant. Classic Defenders typically used green ethylene glycol coolant. Never mix different types.
- What coolant type does a Land Rover Defender use?
- The modern Land Rover Defender (2020+) uses JLR STJLR.651.5003 coolant (pink OAT). Capacity is ~12-14L depending on engine. Mix 50/50 with distilled water.
- Can I use universal coolant in a Land Rover Defender?
- Factory manuals specify exact coolant chemistry for the Land Rover Defender. Using the wrong coolant type can cause corrosion, overheating, or gasket damage. Always match the OEM specification exactly — do not mix incompatible coolant types.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-28