1990 Buick Century Ignition Parts

Engine:

Showing parts for every engine. Select an engine to see only what fits.

This page lists 63 ignition parts for the 1990 Buick Century, across 13 part types, covering both the 2.5L 151cid L4 and the 3.1L 189cid V6. Every part shows its brand, manufacturer part number and fitment notes.

The ignition system on the 1990 Buick Century delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. The largest groups are Spark Plug (18 parts), Ignition Coil (10 parts) and Ignition Lock Cylinder (8 parts). The other 10 part types cover the remaining 27 parts.

Crankshaft Position Sensor

Economy

Brand Part Number Markets Notes Buy
FAMOUS BRAND Fits: 2.5L 151cid L4 CSA1548
🇺🇸 US 🇨🇦 CA
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SPECTRA PREMIUM Fits: 2.5L 151cid L4 S10120
🇺🇸 US 🇨🇦 CA
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STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 PC3T
🇺🇸 US 🇨🇦 CA
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ULTRA-POWER Fits: 2.5L 151cid L4 5S1669
🇺🇸 US 🇨🇦 CA
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Standard Replacement

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Popular Fits: 2.5L 151cid L4 PC3
🇺🇸 US 🇨🇦 CA
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WALKER PRODUCTS Popular Fits: 2.5L 151cid L4 2351007
🇺🇸 US 🇨🇦 CA
Sensor Only
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WELLS Fits: 2.5L 151cid L4 5S1669
🇺🇸 US 🇨🇦 CA
Sensor Body Diameter: 0.590 In
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This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.

Crankshaft Position Sensor Bracket

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 PCB1
🇺🇸 US 🇨🇦 CA
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This table covers the brackets that mount the Crankshaft Position Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners.

Distributor Cap Cover

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 DR443T
🇺🇸 US 🇨🇦 CA
T-Series
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This table covers the Distributor Cap covers.

Distributor Mounting Gasket

Brand Part Number Markets Notes Buy
MAHLE / CLEVITE Fits: 2.5L 151cid L4 72213
🇺🇸 US 🇨🇦 CA
Nitrile
Fitment notes — MAHLE / CLEVITE 72213
Nitrile
O-Ring Type
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MAHLE / CLEVITE Fits: 2.5L 151cid L4 B33003
🇺🇸 US 🇨🇦 CA
O-Ring TypeMolded Rubber
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VICTOR REINZ Fits: 2.5L 151cid L4 411044200
🇺🇸 US 🇨🇦 CA
O-Ring Type
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This table covers the gaskets that seal the Distributor Mounting. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.

Ignition Coil

Economy

Brand Part Number Markets Notes Buy
B&B Fits: 2.5L 151cid L4 BB5039
🇺🇸 US 🇨🇦 CA
2 Req.
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HOLSTEIN Fits: 2.5L 151cid L4 2IGC0005
🇺🇸 US 🇨🇦 CA
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SPECTRA PREMIUM Fits: 2.5L 151cid L4 C503
🇺🇸 US 🇨🇦 CA
Ignition Coil Mounts to Cylinder Head
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WAI GLOBAL Fits: 2.5L 151cid L4 CDR39
🇺🇸 US 🇨🇦 CA
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Premium

Brand Part Number Markets Notes Buy
DELPHI Popular Fits: 2.5L 151cid L4 GN10123
🇺🇸 US 🇨🇦 CA
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Standard Replacement

Brand Part Number Markets Notes Buy
UNITED MOTOR PRODUCTS Popular Fits: 2.5L 151cid L4 C540
🇺🇸 US 🇨🇦 CA
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GM GENUINE Fits: 2.5L 151cid L4 19418991
🇺🇸 US 🇨🇦 CA
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NGK Fits: 2.5L 151cid L4 48780
🇺🇸 US 🇨🇦 CA
Includes Seal
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WALKER PRODUCTS Fits: 2.5L 151cid L4 9201005
🇺🇸 US 🇨🇦 CA
Single Coil
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WELLS Fits: 2.5L 151cid L4 5C1058
🇺🇸 US 🇨🇦 CA
Ignition Type: Distributorless
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This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.

Ignition Coil Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.5L 151cid L4 19260632
🇺🇸 US 🇨🇦 CA
electronic module, FOR 2 TERMS, TYPE II-D/REMY
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This table covers the seals at the Ignition Coil. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Ignition Control Module (ICM)

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 LX344T
🇺🇸 US 🇨🇦 CA
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UNITED MOTOR PRODUCTS Fits: 2.5L 151cid L4 DCM9464
🇺🇸 US 🇨🇦 CA
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WAI GLOBAL Fits: 2.5L 151cid L4 DM1929
🇺🇸 US 🇨🇦 CA
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WELLS Fits: 2.5L 151cid L4 6H1039
🇺🇸 US 🇨🇦 CA
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This table covers the Ignition control modules.

Ignition Lock Cylinder

Economy

Brand Part Number Markets Notes Buy
DORMAN Fits: 2.5L 151cid L4 924790
🇺🇸 US 🇨🇦 CA
with Retaining ScrewChrome
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STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 US107LT
🇺🇸 US 🇨🇦 CA
T-SeriesIncludes Lock Cylinder
Fitment notes — STANDARD MOTOR PRODUCTS US107LT
T-SeriesIncludes Lock Cylinder
with Chrome Finish
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STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 US117LT
🇺🇸 US 🇨🇦 CA
T-Seriesblack
Fitment notes — STANDARD MOTOR PRODUCTS US117LT
T-SeriesblackIncludes Lock Cylinder
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Standard Replacement

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Popular Fits: 2.5L 151cid L4 US107L
🇺🇸 US 🇨🇦 CA
Includes Lock Cylinder
Fitment notes — STANDARD MOTOR PRODUCTS US107L
Includes Lock Cylinder
with Chrome Finish
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WELLS Popular Fits: 2.5L 151cid L4 4H1018
🇺🇸 US 🇨🇦 CA
Finish: Black Textured Plastic
Fitment notes — WELLS 4H1018
Finish: Black Textured Plastic
Black
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GM GENUINE Fits: 2.5L 151cid L4 19356477
🇺🇸 US 🇨🇦 CA
Chrome Ignition Locks
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STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 US117L
🇺🇸 US 🇨🇦 CA
blackIncludes Lock Cylinder
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WELLS Fits: 2.5L 151cid L4 4H1019
🇺🇸 US 🇨🇦 CA
Bright
Fitment notes — WELLS 4H1019
Bright
Chrome
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This table covers the lock cylinders in the ignition switch.

Ignition Lock Housing

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 US165L
🇺🇸 US 🇨🇦 CA
with Tilt Steering Wheel
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This table covers the Ignition Lock housings.

Spark Plug

Summary: Notes include pre-set gaps of 0.039", 0.040", 0.044", 0.045", 0.054", 0.060" and 0.061". Replacement brands in this table include ACDELCO, DENSO and BOSCH.

Copper / Nickel

Brand Part Number Markets Notes Buy
ACDELCO Popular Fits: 2.5L 151cid L4 R45TSX
🇺🇸 US 🇨🇦 CA
GM Original EquipmentConventional
Fitment notes — ACDELCO R45TSX
GM Original EquipmentConventionalPre-Set Gap: 0.054"
Original Equipment-Recommended Gap: .060
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CHAMPION Popular Fits: 2.5L 151cid L4 18
🇺🇸 US 🇨🇦 CA
Copper PlusPre-Set Gap: 0.045"
Fitment notes — CHAMPION 18
Copper PlusPre-Set Gap: 0.045"
OE-Recommended Gap: 0.045"
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ACDELCO Fits: 2.5L 151cid L4 R43TS6
🇺🇸 US 🇨🇦 CA
ProfessionalConventional
Fitment notes — ACDELCO R43TS6
ProfessionalConventionalPre-Set Gap: 0.039"
Original EquipmentOriginal Equipment-Recommended Gap: .060
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BOSCH Fits: 2.5L 151cid L4 7976
🇺🇸 US 🇨🇦 CA
NickelPre-Set Gap: 0.040"
Fitment notes — BOSCH 7976
NickelPre-Set Gap: 0.040"
Gap 0.06 InOriginal Equipment is Copper/Nickel
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DENSO Fits: 2.5L 151cid L4 5037
🇺🇸 US 🇨🇦 CA
U-Groove ConventionalPre-Set Gap: 0.060"
Fitment notes — DENSO 5037
U-Groove ConventionalPre-Set Gap: 0.060"
Gap .060
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NGK Fits: 2.5L 151cid L4 2248
🇺🇸 US 🇨🇦 CA
V-PowerPre-Set Gap: 0.060"
Fitment notes — NGK 2248
V-PowerPre-Set Gap: 0.060"
OE-Recommended Gap: 0.060 in
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Double Platinum (lasts up to 3x longer than Copper / Nickel)

Brand Part Number Markets Notes Buy
ACDELCO Fits: 2.5L 151cid L4 41816
🇺🇸 US 🇨🇦 CA
ProfessionalDouble Platinum
Fitment notes — ACDELCO 41816
ProfessionalDouble PlatinumPre-Set Gap: 0.061"
OE-Recommended Gap: 0.060" (IN)
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AUTOLITE Fits: 2.5L 151cid L4 APP666
🇺🇸 US 🇨🇦 CA
Autolite
Fitment notes — AUTOLITE APP666
Autolite
.060 GapDouble Platinum
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Iridium (lasts up to 4x longer than Copper / Nickel)

Brand Part Number Markets Notes Buy
BOSCH Fits: 2.5L 151cid L4 9659
🇺🇸 US 🇨🇦 CA
OE Fine Wire Double IridiumPre-Set Gap: 0.054"
Fitment notes — BOSCH 9659
OE Fine Wire Double IridiumPre-Set Gap: 0.054"
Original Equipment is Copper/Nickel
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DENSO Fits: 2.5L 151cid L4 5331
🇺🇸 US 🇨🇦 CA
Iridium PowerPre-Set Gap: 0.044"
Fitment notes — DENSO 5331
Iridium PowerPre-Set Gap: 0.044"
Gap .044
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DENSO Fits: 2.5L 151cid L4 4716
🇺🇸 US 🇨🇦 CA
Iridium TTPre-Set Gap: 0.040"
Fitment notes — DENSO 4716
Iridium TTPre-Set Gap: 0.040"
Gap .040
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NGK Fits: 2.5L 151cid L4 7272
🇺🇸 US 🇨🇦 CA
Iridium IXPre-Set Gap: 0.060"
Fitment notes — NGK 7272
Iridium IXPre-Set Gap: 0.060"
OE-Recommended Gap: 0.060 in
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SKP Fits: 2.5L 151cid L4 SP1044
🇺🇸 US 🇨🇦 CA
Tapered Ground Electrode with Platinum Chip
Fitment notes — SKP SP1044
Tapered Ground Electrode with Platinum Chip
Gap: .060/1.5mm
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Platinum (lasts up to 2x longer than Copper / Nickel)

Brand Part Number Markets Notes Buy
ACDELCO Popular Fits: 2.5L 151cid L4 1
🇺🇸 US 🇨🇦 CA
GoldRapidfire
Fitment notes — ACDELCO 1
GoldRapidfireCore Nose Length: 0.730 InPre-Set Gap: 0.045"
OE-Recommended Gap: 0.045" (IN)
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BOSCH Popular Fits: 2.5L 151cid L4 6708
🇺🇸 US 🇨🇦 CA
OE Fine Wire PlatinumPre-Set Gap: 0.054"
Fitment notes — BOSCH 6708
OE Fine Wire PlatinumPre-Set Gap: 0.054"
Original Equipment is Copper/Nickel
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ACDELCO Fits: 2.5L 151cid L4 88901022
🇺🇸 US 🇨🇦 CA
PLATINUM PLUG
Fitment notes — ACDELCO 88901022
PLATINUM PLUG
.060 Gap
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CHAMPION Fits: 2.5L 151cid L4 2079
🇺🇸 US 🇨🇦 CA
Gold PlugCUSTOM
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DENSO Fits: 2.5L 151cid L4 4510
🇺🇸 US 🇨🇦 CA
Platinum TTPre-Set Gap: 0.040"
Fitment notes — DENSO 4510
Platinum TTPre-Set Gap: 0.040"
Gap .040
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This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.

Spark Plug Non-Fouler

Brand Part Number Markets Notes Buy
DORMAN Fits: 2.5L 151cid L4 42006
🇺🇸 US 🇨🇦 CA
14mm Tapered Seat
Fitment notes — DORMAN 42006
14mm Tapered Seat
14 mm Tapered Seat
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This table covers the non-foulers that space a spark plug away from oil fouling.

Spark Plug Wire

Economy

Brand Part Number Markets Notes Buy
PROFESSIONAL'S CHOICE Fits: 2.5L 151cid L4 2950
🇺🇸 US 🇨🇦 CA
Set
Fitment notes — PROFESSIONAL'S CHOICE 2950
Set
STATION WAGON
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Premium

Brand Part Number Markets Notes Buy
NGK Popular Fits: 2.5L 151cid L4 51235
🇺🇸 US 🇨🇦 CA
Set
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STANDARD MOTOR PRODUCTS Fits: 2.5L 151cid L4 7432
🇺🇸 US 🇨🇦 CA
SetStandard® Premium
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UNITED MOTOR PRODUCTS Fits: 2.5L 151cid L4 749
🇺🇸 US 🇨🇦 CA
Permashield-Delcore or United-PackardSet
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UNITED MOTOR PRODUCTS Fits: 2.5L 151cid L4 7419
🇺🇸 US 🇨🇦 CA
United-PackardSet
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Standard Replacement

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Popular Fits: 2.5L 151cid L4 27432
🇺🇸 US 🇨🇦 CA
Pro SeriesSet
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WALKER PRODUCTS Fits: 2.5L 151cid L4 9241229
🇺🇸 US 🇨🇦 CA
Direct FitSet
Fitment notes — WALKER PRODUCTS 9241229
Direct FitSetSuppression Core
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This table covers the Spark Plug wires.

Tune-Up Kit

Brand Part Number Markets Notes Buy
UNITED MOTOR PRODUCTS Fits: 2.5L 151cid L4 37419
🇺🇸 US 🇨🇦 CA
Includes Fuel Filter PCV and Wire SetUnited-Packard
Fitment notes — UNITED MOTOR PRODUCTS 37419
Includes Fuel Filter PCV and Wire SetUnited-PackardIncludes Premium Wire Set
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This table covers the Tune-Up kits.

Buying Ignition Parts for a 1990 Buick Century

On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.

  • Match the engine first. Every ignition part here is engine-specific; each row shows which engine(s) it fits.
  • Read the notes on each row for position, trim and spec qualifiers before you order.
  • Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
  • Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Spark Plug and Ignition Coil .

Frequently Asked Questions

How many ignition parts fit the 1990 Buick Century?

Our catalog currently lists 63 ignition parts for the 1990 Buick Century across 13 subcategories and 23 brands, covering both the 2.5L 151cid L4 and the 3.1L 189cid V6. Each part is matched to the engine(s) it fits.

Do ignition parts differ between 1990 Buick Century engines?

Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

What are the signs of ignition problems on a 1990 Buick Century?

Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What spark-plug gap is listed for the 1990 Buick Century?

Notes on this page include pre-set gaps of 0.039", 0.040", 0.044", 0.045", 0.054", 0.060" and 0.061". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.

What should I replace at the same time?

Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1990 Buick Century was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 1990 Buick Century?

First match the engine — each row shows which engine(s) the part fits. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 1990 Buick Century

Ignition Parts for Other Buick Century Years

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