Webasto Parking Heater Glow Plug 1322420A

A parking heater lights its own fuel-air mixture the same basic way a diesel engine does at startup, using a glow plug to provide the ignition heat. The Webasto 1322420A is a direct-fit replacement for that ignition component.

Key Benefits

Here’s what this part brings to the job:

• Matches the original glow plug’s dimensions and electrical rating for a direct-fit replacement
• Restores reliable startup ignition for the parking heater’s burner chamber
• Sourced directly from Webasto, the original manufacturer of the parking heater unit itself, not a third-party aftermarket equivalent
• Matched to the original part number rather than a universal or generic substitute

What’s In The Box

• Brand: Webasto
• Part / Model Number: 1322420A
• Manufacturer Part Number: 1322420A

A note on this listing: the specification data available for this part from our supplier feed is limited to what’s shown above — we haven’t filled in placeholder dimensions or ratings we can’t verify. If you need additional specifications to confirm fitment against your Webasto unit, contact us and we’ll track them down before you order rather than have you guess.

Application & Use Case

The glow plug in a Webasto parking heater serves a similar role to the glow plug in a diesel engine: it heats up to ignite the fuel-air mixture in the burner chamber during startup. Once the flame is established, the heater’s control unit typically reduces or cuts power to the glow plug, since the ongoing combustion sustains itself. A failing glow plug commonly shows up as a parking heater that attempts to start, runs through its priming cycle, and then shuts down with a fault code rather than firing up — a classic no-ignition symptom on these units.

Confirm the 1322420A matches your specific Webasto unit’s model before ordering — glow plugs are matched to the exact heater model, and a mismatched part number, even from the same manufacturer, may not fit the burner chamber correctly or draw the right current. For manufacturer-specific installation and diagnostic guidance, see Webasto’s own technical resources.

Installation Overview

Replacing a parking heater’s glow plug requires accessing the burner chamber, which means the heater unit generally needs to be at least partially removed or opened up depending on the model — this is a more involved job than a typical engine glow plug swap because of the compact, sealed nature of most auxiliary heater units. The old glow plug is disconnected electrically and removed from the burner housing, and the 1322420A is installed in its place with attention to the seal at the mounting point to prevent combustion gas leaks. As with the water pump, clear any stored fault codes on the heater’s control module and run a test cycle afterward to confirm the unit ignites and runs normally.

Quality & Manufacturing Standards

Webasto is a German manufacturer founded in 1901 and a leading original-equipment supplier of vehicle parking heaters and auxiliary heating systems, used across passenger cars, campers, trucks, and marine applications.

Parking heaters (also called auxiliary heaters) are a common factory or dealer-installed option in colder climates and on vehicles like campers, trucks, and buses, where warming the cabin or pre-heating the engine without idling saves fuel and reduces cold-start wear. Because these units run their own independent combustion and coolant circulation cycle, their internal components — including the water pump and glow plug — are purpose-built for the heater rather than shared with the vehicle’s main engine parts.

Shipping & Delivery

This part ships from our US warehouse network to all 50 states. Order processing and transit times are listed on our shipping policy. Every order includes tracking, and our contact team can help if you need it faster for a heater that’s currently out of service.

Support, Warranty & Returns

We stand behind what we sell: review our warranty policy and terms of service before you buy, browse our FAQ page for common fitment and shipping questions, or contact us directly if you have a question this listing doesn’t answer. You can also browse our full parking heater parts selection to compare this part against other options for your unit. Learn more about how we source and vet the parts we carry on our about us page.

Frequently Asked Questions

Can I install this myself?

Parking heater components are more specialized than typical engine parts, and the units are compact and electronically controlled. DIYers comfortable with automotive electrical work and coolant systems can often handle these repairs, but if you’re not familiar with your specific Webasto unit, having a heater specialist handle it reduces the risk of a comeback issue.

How long does shipping take?

See our shipping policy for current delivery timing. We ship to all 50 US states.

What’s your return and warranty policy?

Full terms are posted on our warranty policy page. If a part arrives damaged or doesn’t match your order, contact our team and we’ll help sort out a replacement or return.

Is a core exchange required on this part?

No core exchange is required for this part — it ships as a standalone replacement unit.

Why is there so little specification data on this listing?

This is a genuine limitation of the source data available for this part, not something we’re withholding. If you need dimensional or electrical specifications beyond what’s listed above to confirm fitment, please reach out and we’ll do our best to track them down before you order.

How do I know which Webasto model I have?

Check the model designation printed directly on the heater unit’s housing, or check your vehicle’s documentation if the heater was factory-installed. Parking heater parts are matched to the specific unit model, not to the vehicle itself.

Is this the correct part for my specific Webasto unit?

Match the part number listed above against your unit’s original part or your vehicle/heater documentation. Given how limited the published specifications are for this part, we’d strongly recommend you contact our team to confirm fitment before ordering.

What does “1322420A” mean on the box?

That’s the Webasto part number for this exact part — 1322420A. Use it to cross-reference against your old part or your heater’s documentation to confirm you’re ordering the correct unit.