Lexus RC 350 Block Heater Guide
2015–2025
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 RC 350 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 RC 350 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 | 2015–2020 | — | — | 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.
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What it costs to plug in a Lexus RC 350 — and what it saves
No supplier lists a wattage for every RC 350 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 | +$0.33 |
| Manitoba | 10.2 | $0.08 | $9.79 | +$0.30 |
| Ontario (avg TOU) | 12.8 | $0.10 | $12.29 | +$0.28 |
| Alberta | 14.0 | $0.11 | $13.44 | +$0.27 |
| Saskatchewan | 15.5 | $0.12 | $14.88 | +$0.26 |
| Nova Scotia | 17.9 | $0.14 | $17.18 | +$0.24 |
Natural Resources Canada rates the Lexus RC 350 at 12.3 L/100 km in city driving (median across 2015–2025 model years). On a 20 km winter commute that is about 2.5 L a day. NRCan measured that at −20 °C a block heater improves overall fuel economy by as much as 10% — roughly 0.25 L, or $0.38 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.
Block heater recalls on the Lexus RC 350
Transport Canada has recorded 2 recalls on the RC 350 that involve the block heater or its cord. Check your VIN before you buy parts — if your vehicle is affected, the repair is free.
Issue: This recall is for certain block heater kits installed on certain vehicles or sold as accessories at Toyota or Lexus dealerships. On certain vehicles, the engine block heater cable may not have enough heat protection and could be damaged by high temperatures. If this happens, the cable could short circuit while plugged in, and cause the wiring to overheat or melt. Note: This recall only affects the following block heater/cord part numbers: C014003034 PK5A408J09 PU14000904 C014003151 PK5A408J13 PU14000905 C014000885 PK5A489J11 PU14000907 C014000888 PK5A489J22 PU14000909 C014000907 PK5A410H00 PU14000911 C014100904 PU14000900 PU14000913 C014100907 PU14000901 PU14003571 C014100911 PU14000902 PK5A489J14 PK5A408J05 PU14000903 Safety Risk: Engine block heater wiring that overheats or melts could create the risk of a fire. Corrective Actions: Toyota recommends that you should stop using the engine block heater immediately. Toyota will notify owners by mail and instruct you to take your vehicle to a dealer to disable the engine block heater. For some vehicles, the corrective actions for this recall are under development. For others, a new engine block heater cannot be installed, and the owner will receive a refund of the purchase price of the engine block heater.
On certain vehicles, the electrical power cords of some dealer installed block heaters may have been improperly manufactured, causing the wires to contact each other, resulting in a short circuit. A short circuit could lead to a fire which would increase the risk of injury and/or damage to property. Correction: For vehicles where the subject block heater was approved for installation, the dealer will replace the block heater assembly with a new one of an improved design. For vehicles where the subject block heater was not approved for installation, dealers will remove the block heater assembly. In the interim, until the remedy can be performed, dealers will cut the plug end from the block heater cord to disable the block heater's operation.
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 RC 350'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.
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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.
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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 RC 350 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 RC 350?
The recommended setup is a frost plug (cartridge) block heater (typically 400 W). Catalog candidates for the Lexus RC 350 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 RC 350?
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 RC 350?
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 RC 350?
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 RC 350?
Yes. Natural Resources Canada rates the RC 350 at 12.3 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 0.25 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.
Is there a block heater recall on the Lexus RC 350?
Yes. Transport Canada has 2 recalls on file for the RC 350 involving the block heater or its cord — starting with recall 2021723. Check your VIN in Transport Canada's recall database before buying parts; if your vehicle is affected the repair is free.
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.
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