Lexus LS 500H Block Heater Guide
2018–2025
Find the part for your engine
Check the engine size on your vehicle documents or under-hood label. Choose it explicitly even when only one option appears.
Already have a factory heater? A missing power cord may be all you need. Match the connector before ordering.
View the full engine and installation tableCatalog candidates for the Lexus LS 500H are grouped by engine below. Check the source review for the exact application before choosing a heater or cord; shared engine size alone does not confirm fitment.
Factory availability
Dealer-installed accessory in Canada on most years and trims
Cord location
Most installs route the cord to the front grille or bumper area, driver's side. Check for an existing coiled cord before buying anything.
Lexus LS 500H engines & block heater part numbers
Engine list built from Natural Resources Canada model-year data. Part numbers are catalog candidates unless a source review is shown for that application. Confirm the exact engine code, model year and installation port before ordering; an Amazon listing match does not confirm vehicle fitment.
| Engine | Years | Zerostart kit | Cord | Kat's heater | Install location |
|---|---|---|---|---|---|
| 3.5L 6-cyl Kat's 11813 is an unconfirmed engine-level catalog candidate. The Lexus table contains ambiguous engine codes; displacement alone does not confirm your engine, hybrid variant or installation port. Verify with the manufacturer before ordering. Manufacturer source | 2018–2020 | — | — | 11813Catalog candidate — confirm exact engine code and model year.+ cord 28813 | — |
| 3.5L 6-cyl The cited Kat's Lexus table does not cover this engine/year range for 11813. Its previous association has been removed pending exact-engine confirmation; this is not proof the part cannot fit. Manufacturer source | 2021–2025 | No aftermarket listing — use the genuine Lexus dealer kit | |||
Reading the numbers: Zerostart 31/35- is the heater kit, 36- the detachable cordset ("lit" glows when the outlet is live). Kat's 11xxx is an element, 28xxx a cordset, 24xxx a pad. Location codes are the manufacturer's (LF = left front of block).
Find the heater or replacement cord
Match the exact part, engine and connector before buying. Search links are discovery links, not confirmed fits.
Amazon buying options
Kat's 11813 cartridge heater
Catalog starting point: confirm exact engine code, year and installation with the manufacturer.
Choose your Amazon store
Affiliate links. As an Amazon Associate, we earn from qualifying purchases.
What it costs to plug in a Lexus LS 500H — and what it saves
No supplier lists a wattage for every LS 500H element, so this uses the 400 W figure typical of this body style. Natural Resources Canada recommends a timer that runs the heater two hours before you drive rather than all night — that is what the numbers below assume.
| Province | ¢/kWh | Cost per 2 h plug-in | Full winter (120 nights) | Net per day |
|---|---|---|---|---|
| Quebec | 7.0 | $0.06 | $6.72 | +$0.26 |
| Manitoba | 10.2 | $0.08 | $9.79 | +$0.23 |
| Ontario (avg TOU) | 12.8 | $0.10 | $12.29 | +$0.21 |
| Alberta | 14.0 | $0.11 | $13.44 | +$0.20 |
| Saskatchewan | 15.5 | $0.12 | $14.88 | +$0.19 |
| Nova Scotia | 17.9 | $0.14 | $17.18 | +$0.17 |
Natural Resources Canada rates the Lexus LS 500H at 10.1 L/100 km in city driving (median across 2018–2025 model years). On a 20 km winter commute that is about 2.0 L a day. NRCan measured that at −20 °C a block heater improves overall fuel economy by as much as 10% — roughly 0.20 L, or $0.31 of gasoline at $1.55/L. On a single short trip at −25 °C the saving can reach 25%. In most provinces the electricity costs less than the fuel it saves; in the priciest it roughly breaks even, and you still get the wear, defrost and cabin-heat benefits.
Fuel figures: Natural Resources Canada Fuel Consumption Ratings and Block Heaters Save Fuel and Help the Environment. Electricity rates are approximate 2026 residential averages — run your own numbers in the cost calculator.
Cold-weather recalls on the Lexus LS 500H
No block-heater recall is on file for the LS 500H, but Transport Canada has recorded cold-weather and cooling-system recalls worth checking before you install anything.
Issue: Under certain conditions, a software problem could cause the rearview camera image to freeze or not to display. If this happens, the rearview image may not display when the transmission is shifted into reverse. Canadian regulations require the rearview image to display when the vehicle is reversing. Note: This recall only affects certain vehicles equipped with a panoramic view monitor system. Safety Risk: A rearview camera image that doesn't display correctly could reduce a driver's ability to see behind the vehicle while backing up. This could increase the risk of a crash. Corrective Actions: The company will notify owners in writing and advise you to take your vehicle to a dealership to update the parking assist ECU software.
Source: Transport Canada Vehicle Recalls Database. Look up your VIN in the official recall search — this list is filtered to block-heater and cold-weather items and is not the vehicle's full recall history.
No tools? The stick-on option
If you'd rather skip the install entirely, a magnetic heater grips any flat steel surface — oil pan, block, transmission pan — and moves between vehicles. Check that the LS 500H's oil pan is steel first: a magnet won't hold on aluminum or composite pans.
Amazon buying options
Zerostart 3400017 magnetic heater, 200 W
A magnetic surface heater from Zerostart. Grips any flat steel surface — oil pan, transmission pan, small-engine sump. CSA certified.
Match the surface material, size and manufacturer limits. This is not vehicle-specific fitment.
Choose your Amazon store
Affiliate links. As an Amazon Associate, we earn from qualifying purchases.
Part reference
Digital multimeter with resistance and continuity
The definitive block-heater test tool. Any meter with an ohms range and audible continuity can isolate a dead cord from a failed element.
Confirm the exact specification and application in the listing before ordering.
No exact purchase listing verified yet. These links search Amazon; confirm the part before buying.
Affiliate links. As an Amazon Associate, we earn from qualifying purchases.
First: check whether you already have one
Canadian-market vehicles are often fitted at the port or dealer and then forgotten by the next owner, so check the cord location above before you buy anything. If a cord is there, test it — a dead element and a dead cord look identical from the outside.
If you need one installed
Budget $40–$120 CAD for the part plus about an hour of labour, and book in October — Prairie shop calendars fill after the first cold snap.
FAQ
Does the Lexus LS 500H come with a block heater?
Dealer-installed accessory in Canada on most years and trims. Check behind the grille for a coiled cord before buying anything — many Canadian-market vehicles have a heater installed that the owner never knew about.
What block heater fits a Lexus LS 500H?
The recommended setup is a frost plug (cartridge) block heater (typically 400 W). Catalog candidates for the Lexus LS 500H are grouped by engine below. Check the source review for the exact application before choosing a heater or cord; shared engine size alone does not confirm fitment.
What is the block heater part number for a Lexus LS 500H?
3.5L 6-cyl: Kat's heater 11813 with cord 28813. Confirm displacement and model year against the fitment table before ordering.
Where is the block heater cord on a Lexus LS 500H?
Most installs route the cord to the front grille or bumper area, driver's side. Check for an existing coiled cord before buying anything.
How much does it cost to plug in a Lexus LS 500H?
At 400 W on a two-hour timer the heater uses about 0.80 kWh a night — roughly 10¢ in Ontario, 11¢ in Alberta and 6¢ in Quebec. Over a 120-night winter that is about $13.44 at Alberta rates.
Does a block heater save fuel on a Lexus LS 500H?
Yes. Natural Resources Canada rates the LS 500H at 10.1 L/100 km in city driving, and found that at −20 °C a block heater improves overall fuel economy by as much as 10% — about 0.20 L on a 20 km winter commute. On a single short trip at −25 °C the saving can reach 25%. In most provinces that is worth more than the electricity it costs.
Should you plug in tonight?
Enter your city — we check tonight's forecast and give you a straight answer based on the temperature thresholds that matter.
More Lexus models
Similar vehicles