Costco 21128 Grill Parts

Highest quality replacement parts for your Costco 21128 - Free USA shipping $49 or more* - No Sales Tax*

Costco 21128 owners manual and diagrams

Diagrams & owners manual not available for grill model# 21128. If you have a manual you're willing to share, please click here to send us an email with the attached manual. Thank You!

Replacement grill parts for Costco model: 21128

This page shows all of the parts we know fit model Costco 21128. We might not show the part you need here but we may still have it, or a functional equivalent. In this case, try the category buttons on the right. For example, if your looking for an ignitor, or other ignition components, and there are none here, click the ignition button to see what we have for Costco grills. Knowing the dimensions of your existing part will help you find the right part.

To get the correct Costco 21128 BBQ parts

You should measure your existing parts and compare them to what we show here. This is best done with them removed from the grill.
Verify your Costco model number by checking the CSA appliance tag on your grill to make sure you have the correct model number. Do not rely solely on the owners manual as these are frequently mixed up at retail stores when the grills are assembled. You'd be surprised at how many folks have the wrong owners manual.

21128 Burners

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44305-R 5-Pack Cast stainless steel burners for Costco model 21128.

Replaces original Bull part# 44305
Includes adjustable air shutter and screw in the venturi for adjusting air flow.
Sold as a set of five (5) burners

Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.

Part Number: BULL-44305-R-X5 (Replaces Costco BULL-44305-X5)
Dimensions: 16” x 2 5/8”
Material: stainless steel
Weight: 16.25

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44305-R Cast stainless steel heavy-duty burner for Costco model 21128.

Replaces original Bull part# 44305
Includes adjustable air shutter and a screw in the venturi for adjusting air flow.
Sold individually

Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.

Part Number: BULL-44305-R (Replaces Costco BULL-44305)
Dimensions: 16” x 2 5/8”
Material: cast stainless steel
Weight: 4.0

==> All Costco Burners.

21128 Cooking Grids

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16517-R 5-Pack Stainless steel cooking grates for Costco model 21128.

SET OF FIVE (5)
Premium grade 304 stainless steel
Solid stainless rods

NOTE: Some models refer to this part as a Cooking Grid.

This part replaces original BULL part# 16517.

Part Number: BULL-16517-R-X5 (Replaces Costco BULL-16517-X5)
Dimension Front-to-Back: 19 1/2”
Dimension Side-to-Side: 7 1/2”
Material: stainless steel
Weight: 25.00

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16517-R Stainless steel cooking grate for Costco model 21128.

Premium grade 304 stainless steel
Solid stainless rods
Sold individually

NOTE: Some models refer to this part as a Cooking Grid.

This part replaces original BULL part# 16517.

Part Number: BULL-16517-R (Replaces Costco BULL-16517)
Dimension Front-to-Back: 19 1/2”
Dimension Side-to-Side: 7 1/2”
Material: stainless steel
Weight: 5.00

==> All Costco Cooking Grids.

21128 Heat Plates

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16521-R 5-PACK Premium grade stainless steel flame tamers for Costco model 21128.

Replacement for original Bull part# 16521.
Fits Bull-made 4 and 5-Burner grills.
One required for each burner.
Sold as a set of five (5).

Part Number: BULL-16521-R-X5 (Replaces Costco BULL-16521-X5)
Dimension Front-to-Back: 17 5/8”
Dimension Side-to-Side: 4 5/8”
Material: stainless steel
Weight: 4.5

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16521-R Premium grade stainless steel flame tamer for Costco model 21128.

Replacement for original Bull part# 16521.
Fits Bull-made 4 and 5-Burner grills.
SOLD INDIVIDUALLY.

Part Number: BULL-16521-R (Replaces Costco BULL-16521)
Dimension Front-to-Back: 17 5/8”
Dimension Side-to-Side: 4 5/8”
Material: stainless steel
Weight: .90

==> All Costco Heat Plates.

21128 Accessories

Wundersmoke Maple Chips. These unique maple wood smoking chips add distinctive maple wood flavoring to your food. For use will all grills. One 1lb bag. Comes with reusable puck.

Part Number: BP-7
Weight: 1.0

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EZ Check Gas level indicator. Accurate from -22° to 104°F. Magnetic back. Works on all sizes of tanks.

Part Number: 00030
Weight: 0.1

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Stainless steel chicken roaster. Commonly called Beer Can roasters.

The best way to roast poultry on the grill
For use in barbecues and ovens
Dishwasher safe
Includes rack, rack support, and basting brush

Part Number: 41333
Material: stainless steel
Weight: 0.10

Stainless steel straight handle grill brush with replaceable head. Brass bristles and scarper. See part# WB-8RH for replacement grill brush heads. 18 1/2” long.
This part is currently out of stock, but more are already on the way and expected to arrive SPRING 23

Part Number: WB-8
Dimensions: 18 1/2
Material: stainless steel
Weight: 0.8

==> All 21128 Accessories.

BBQ Part Categories

Costco grill 21128 - Sunday, May 5 2024

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More Costco grill models we have parts for
720-0070-LP \| 720-0077-LP \| 720-0083-04R \| 720-0108 \| 720-0193 \| 720-0432 \| 720-0709B \| 720-0720 \| 720-0727 \| 720-0733 \| 720-0830MB \| 720-0896CA \| 720-0954G \| 730-0954G \| 740-0711 \| 740-0712 \| 780-0832C \| 860-0193 \| Bread Breaker Two \| CGR27 \| CGR27LP \| CGR30 \| CGR30LP \| CGR30NG \| CGR44 \| CGR54 \| CS784LP \| CS812 \| CS812LP \| CS892LP \| GSC3218WA \| GSC3218WAN \| GSS2116B-1 \| PC-2600L \| PC-2600L (pre 2006) \| PCA-2600L \| PCA-2600L (pre 2006) \| SGIR27LP \| SGR27LP \| SGR30 \| SGR30M \| SGR30MLP \| Steadfast Two \| TGR30LP \| TGR38 \| 1500111 \| 1500131 \| 2001SS-LP \| 210001-LP \| Complete list of Costco grill models...

More Costco grill models we have parts for

720-0070-LP | 720-0077-LP | 720-0083-04R | 720-0108 | 720-0193 | 720-0432 | 720-0709B | 720-0720 | 720-0727 | 720-0733 | 720-0830MB | 720-0896CA | 720-0954G | 730-0954G | 740-0711 | 740-0712 | 780-0832C | 860-0193 | Bread Breaker Two | CGR27 | CGR27LP | CGR30 | CGR30LP | CGR30NG | CGR44 | CGR54 | CS784LP | CS812 | CS812LP | CS892LP | GSC3218WA | GSC3218WAN | GSS2116B-1 | PC-2600L | PC-2600L (pre 2006) | PCA-2600L | PCA-2600L (pre 2006) | SGIR27LP | SGR27LP | SGR30 | SGR30M | SGR30MLP | Steadfast Two | TGR30LP | TGR38 | 1500111 | 1500131 | 2001SS-LP | 210001-LP | Complete list of Costco grill models...