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Replacement Preglow Time Relay Information

Choose from top brands including: HellaVemoFebi

Preglow Time RelayIf you drive a car or truck with a diesel engine, you know that you have different concerns that some of your compatriots with gasoline-powered internal combustion engines. Diesel engines are designed differently and work on different principles – so you need different knowledge and expertise to keep them running smoothly. One place where a diesel engine differs significantly from a gasoline-powered engine is in the starting mechanism. While a gasoline-powered internal combustion engine relies on spark plugs and the explosion caused by oxygen and gasoline vapor, a diesel engine starts based on a system that uses pressure and hot temperatures. The glow plug, for example, is used to get the engine started when it is cold and does not yet have the necessary heat to make the system function. Another key component of the starting mechanism of a diesel engine is the preglow time relay. If you’re having trouble getting your diesel engine to start reliably, you may be experiencing problems with this component. If that’s the case, you need to visit PartsGeek.com for the components you need to get your car running right again.

Replacement Preglow Time Relays

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Review Fitment Notes
Huco Preglow Time Relay - for 1995 Mercedes E300 - W0133-1603337 Click to Enlarge
Website Reviews
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Part Number: W0133-1603337
Brand: Huco
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$206.00
Our Price: $122.58
(1) In Stock
This Part Fits:
Catalog: A
Vehicle
1995 Mercedes E300
Stribel Preglow Time Relay - for 1997 Mercedes E300 - W0133-1606208 Click to Enlarge
5 Stars
Stribel W0133-1606208
Preglow Time Relay
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Part Number: W0133-1606208
Brand: Stribel
Product Remark: NLA 2.18
Condition: New
Shipping Options: Ground, Overnight, 2 Day
OEM
List Price:
$199.00
Our Price: $92.58
View Details
This Part Fits:
Catalog: A
Vehicle
1997 Mercedes E300
Hella Preglow Time Relay - for 1985 Mercedes 300TD - W0133-1607146 Click to Enlarge
5 Stars
Hella W0133-1607146
Preglow Time Relay
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Part Number: W0133-1607146
Brand: Hella
Notes: Optional with 002 545 06 32.
Condition: New
Shipping Options: Ground, Overnight, 2 Day
OEM
List Price:
$250.00
Our Price: $204.58
View Details
This Part Fits:
Catalog: A
Vehicle
1985 Mercedes 300TD
Vemo Preglow Time Relay - for 1983 Mercedes 240D - W0133-1605414 Click to Enlarge
5 Stars
Vemo W0133-1605414
Preglow Time Relay
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Part Number: W0133-1605414
Brand: Vemo
Notes: w/ OE Number 001 545 97 32
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$241.13
Our Price: $91.58
(6) In Stock
This Part Fits:
Catalog: A
Vehicle
1983 Mercedes 240D
Febi Preglow Time Relay - for 1981 Mercedes 300SD - W0133-1607146 Click to Enlarge
Website Reviews
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Part Number: W0133-1607146
Brand: Febi
Notes: Optional with 002 545 06 32.
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$250.00
Our Price: $115.58
(20) In Stock
This Part Fits:
Catalog: A
Vehicle
1981 Mercedes 300SD
AC Delco Accessory Power Receptacle Relay - for 2021 Chevrolet Colorado LT 4WD - Crew Cab Pickup - D1786C Click to Enlarge
4.8 Stars
AC Delco D1786C
Accessory Power Receptacle Relay
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Part Number: D1786C
Brand: AC Delco
Notes: GM Original Equipment -- New; 4-TERMINAL, RECTANGLE, GRAY, HIGH-CURRENT 280 MICRO
Condition: New
Shipping Options: Ground
$10.18
View Details
This Part Fits:
Catalog: B
Vehicle Sub Model Body Wheel Base
2021 Chevrolet Colorado LT 4WD Crew Cab Pickup 140.5
AC Delco Accessory Power Receptacle Relay - for 2021 GMC Canyon AT4 4WD - 13500114 Click to Enlarge
5 Stars
AC Delco 13500114
Accessory Power Receptacle Relay
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Part Number: 13500114
Brand: AC Delco
Notes: GM Original Equipment -- New
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function
Condition: New
Shipping Options: Ground
$10.73
(10) In Stock
This Part Fits:
Catalog: T
Vehicle Sub Model Wheel Base
2021 GMC Canyon AT4 4WD 140.5
AC Delco Engine Control Module Relay - for 2021 Chevrolet Silverado 1500 - Standard Cab Pickup 2dr - 13422668 Click to Enlarge
Website Reviews
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Part Number: 13422668
Brand: AC Delco
Notes: Engine Control Module Relay -- New; 4-TERMINAL
Condition: New
Amperage Rating: 20 A
Shipping Options: Ground
$28.98
(6) In Stock
This Part Fits:
Catalog: N
Vehicle Body
2021 Chevrolet Silverado 1500 Standard Cab Pickup 2dr

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Preglow Time Relay Information

Your car's diesel engine differs from gasoline motors because it uses glow plugs rather than spark plugs and glow plugs require Hella Preglow Time Relays.

Hella Hella Preglow Time Relay

To get unbeatable satisfaction out of your vehicle, consider a Hella preglow time relay. Successful automobile manufacturers grasp the basic importance of high performance. A new vehicle requires the best replacement parts that you can buy. Take your car or truck to a higher level of power with performance equipment. Preglow time relays send signals to a car's glow plugs telling to warm up. A car's preglow time relays is a required part of the vehicle's diesel motor. A vehicle's diesel ignition differs from gasoline engines because diesel engines use glow plugs instead of spark plugs and these require preglow time relays.

Preglow Time Relay

Bitter cold temperatures can make it especially difficult to get high-performance diesel engines started. Since diesel vehicles rely on just the right balance of internal temperatures and pressures to initiate ignition, glow plugs and the preglow relays that regulate them are essential to avoid hard starting.

At PartsGeek.com you will find a wide range of preglow timers from top brands like Beck Arnley, Huco, Stribel and Vemo. We pride ourselves on the quality of our parts, our quick delivery times and outstanding customer service. And our 30-day return policy helps us to make absolutely certain that you get exactly the part you need to get driving again.

What is a preglow time relay?

Preglow time relays work in conjunction with the glow plugs (heating devices) that are used in diesel vehicles to enable engine ignition. While standard gas-powered vehicles utilize spark plugs to initiate the ignition explosion, diesel engines require high pressures and temperatures. During periods of very cold weather, certain diesel engines can be difficult or very slow to start.

When electrified, the plugs begin to glow with radiating heat (think of the heating coils in a toaster oven), allowing for fuel combustion despite low environmental temperatures. In older engines the driver would have to manually guess how long the plugs would need to heat up in order to achieve a working temperature. Preglow relays automate this process, communicating with an in-cabin indicator light that signals when the engine is ready to start.

How much does a replacement preglow time relay cost?

The cost of replacement relays will depend on the make and model of your diesel car. Most of the preglow time relays on PartsGeek.com cost between $100 and $200.

What are some symptoms of a faulty preglow timer?

The most common signs of poorly functioning preglow time relays are an illuminated glow plug or check engine light and difficulty getting the engine started. Failing glow plugs may not be able to produce sufficient heat. Meanwhile, failing preglow time relays can lead to even worse issues; timers that fail to keep glow plugs from operating at high temperatures for too long can easily lead to rapid internal parts wear and poor overall engine performance.

What is the difference between an in-cylinder and an in-manifold glow plug?

Engines that use in-cylinder design either employ an individual plug within each cylinder (direct injection) or within a pre-chamber adjacent to the cylinder (indirect injection). In-manifold engine designs use only one plug for all of the cylinders.

Shop Popular Models
Some of our Customer Reviews
5 of 5
Verified Customer
7/9/13 07:52 AM - USA

Excellent price! Recently I had to buy 2 of these as both had become continual battery drains! Its a complicated unit and cannot be expected to last forever so it was great to find a good quality, quick delivery source, and at the best price too. Parts Geek is one of 3 sources I check as they almost slways have even the oddest parts I might need. - Le Mercedes

- 1983 Mercedes 300SD Preglow Time Relay
5 of 5
Verified Customer
6/8/14 04:42 PM - USA

This product was an exact fit, and a very easy repair to do at a great price! - Great price!

- 1981 Mercedes 300D Preglow Time Relay
5 of 5
Verified Customer
6/21/15 02:35 PM - USA

As a Ret. M.B Wrench lets Wait and see how long it lasts. The Original lasted 18 Years! - The Benz Guy

- 1983 Mercedes 300TD Preglow Time Relay
5 of 5
Verified Customer
2/17/16 05:06 AM - USA

Item was just as described and was well packaged and shipped in a timely manner. - Larry

- 1983 Mercedes 240D Preglow Time Relay
5 of 5
Verified Customer
4/24/16 08:33 PM - USA

The pergola relay is the best priced one I could find online. It works as it should and my Benz finally runs smooth at startup again. - Prey low relay

- 1991 Mercedes 300D Preglow Time Relay
5 of 5
Verified Customer
10/23/17 01:44 PM - USA

Received ordered item quickly after order. Original OEM replacement part

for my Mercedes. Including shipping and insurance on delivery, this was the best pricing and ROI savings I could find. I have had nothing but an

excellent experience ordering and receiving parts from the GEEK - Ronald N

- 1998 Mercedes E300 Preglow Time Relay