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A relay socket is not the exciting part of an electrical repair, but it can be the part that makes the repair serviceable. When a relay is hard-wired, damaged, corroded, or mounted in a hacked-together way, a proper socket can make future relay testing and replacement cleaner.

Bosch 3334485008 is a mini relay socket buyer should approach as a physical and electrical match question. The socket has to fit the relay style, terminal plan, wiring, voltage requirement, and mounting location. Shape alone is not enough.

What Parts Universe lists

Parts Universe currently lists this item as BOSCH 3334485008 Mini Relay Socket. The Shopify product record verified for this article shows:

• Parts Universe SKU: BSH-3334485008
• UPC / barcode in Shopify: 03165142904832
• Current Parts Universe price: $1.99
• Current Shopify inventory: 200 units
• Current inventory policy: CONTINUE
• Current status: active and available for sale

What Bosch verifies

Bosch's official AutoParts Catalogue identifies 3334485008 as a relay socket in the Comfort Electronics Others category. Bosch lists the unpacked dimensions as 36 mm long, 30 mm wide, and 24 mm high. The same Bosch record lists relay function as normally open contact, switch function as without wiper function, and rated voltage as 12 V.

Parts Universe's product description also says Mini Relay Socket, 12/24V. Because the Bosch e-catalog record viewed for this article lists 12 V, buyers working on a 24 V circuit should confirm the exact relay, terminal set, and service information before assuming the socket is correct for that application.

When this socket makes sense

• You are repairing or building a relay location that needs a removable relay instead of permanent splices.
• The relay footprint and terminal layout match the socket.
• The mounting space can accept the 36 mm by 30 mm by 24 mm body size Bosch lists.
• The circuit documentation supports the relay function, wire gauge, terminals, fuse protection, and voltage you plan to use.

Checks before ordering

Start with the relay and service information, not the socket photo. Confirm the relay pin numbers, the coil terminals, load terminals, contact type, and any diode or resistor protection in the relay itself. A socket can hold the relay, but it does not make an incorrectly specified relay safe for the circuit.

Also confirm the terminals that lock into the socket. Many relay sockets require the correct crimp terminals for the wire gauge and current load. Loose terminals, undersized wire, poor crimps, or missing strain relief can create heat, voltage drop, intermittent operation, or repeat failures.

How this differs from buying a relay

Parts Universe has recently covered Bosch mini relays such as 0986332402. Bosch 3334485008 is not a substitute relay. It is the socket side of the job. Buy it when the relay base, wiring, or mounting arrangement is the problem, and buy the relay separately only after confirming the part number and circuit requirements.

Practical safety notes

• Disconnect power before cutting, crimping, or repinning relay wiring.
• Use the vehicle or equipment service information for circuit protection and relay function.
• Do not increase fuse size to work around heat, voltage drop, or repeated relay failure.
• If the old socket is melted or corroded, diagnose the root cause before installing the new socket.

Related Parts Universe links

• Shop Bosch 3334485008 Mini Relay Socket
• Browse Bosch products
• Browse relays
• Browse relays and flashers
• Browse electrical and electronics
• Browse sensors, relays, and electrical parts

For most buyers, Bosch 3334485008 is worth considering when the repair calls for a clean mini relay socket and the relay, terminals, voltage, and mounting location are already verified. It is not a shortcut around proper circuit identification.

A small relay can create a large diagnostic mess when the replacement is chosen by shape alone. The housing may look familiar, but a buyer still needs to confirm the part number, pin count, contact rating, coil suppression, and whether the mounting style matches the vehicle or equipment.

Bosch 0986332402 is a useful example because it is a 5-pin, 12 V changeover mini relay with a diode. It also appears in Bosch relay data as the successor reference for 0332209158, making it a practical part-number match question rather than a generic relay-shopping decision.

What Parts Universe lists

Parts Universe currently lists this item as BOSCH 0986332402 Changeover Mini Relay, Diode, 5 Pins, 12 V, 20/30 A. The active Shopify product record verified for this article shows:

• Parts Universe SKU: BSH-0986332402
• UPC: 4047024887020
• Current Parts Universe price: $5.99
• Current inventory: 202 units
• Current inventory policy: CONTINUE
• Current status: active and available for sale

What Bosch verifies

Bosch I-Business describes Bosch relays as a range of 12 V and 24 V relays for mobile and stationary applications. In Bosch's mini-relay table, part number 0986332402 is listed with predecessor 0332209158, current rating 30/20 A, 5 pins, diode coil connection, a mounting bracket, and 150,000 lifetime cycles.

Bosch Mobility Aftermarket also frames mini relays around vehicle electrical jobs such as fuel pumps, direction indicators, horns, all-round beacons, and headlights. That application list is a category guide, not a fitment promise for every vehicle.

When this relay is a good candidate

• The original relay or service information calls for Bosch 0986332402.
• The old relay is marked 0332209158 and Bosch replacement data points to 0986332402.
• You need a 5-pin 12 V changeover mini relay with diode coil suppression, not a 4-pin normally-open relay or a relay with different coil protection.
• The socket, terminal layout, and mounting bracket match the relay location you are servicing.

What to check before ordering

Do not use amperage and pin count as the only decision. For relay replacement, check the relay diagram on the case, the terminal numbers, the service manual, and the connector cavity. A diode relay can be polarity-sensitive, so installing a different coil-suppression style can create diagnostic faults or circuit damage.

If the old relay is stuck, Bosch's relay-change guidance says to disconnect the battery to prevent discharge and short circuits, then carefully loosen the relay. Bosch also recommends a function test by cross-swapping with an identical relay. Identical is the important word: cross-swap only when the rating, pin layout, and relay function match.

How this differs from a 100A power relay

Parts Universe recently covered Bosch 0332002159, a 100A normally-open power relay. Bosch 0986332402 is a different buyer problem: it is a compact 5-pin changeover mini relay rated 30/20 A with diode suppression. Do not substitute between those categories just because both are Bosch relays.

Practical safety notes

• Disconnect the battery before relay removal when the service procedure calls for it.
• Do not bypass a relay socket with wire or tools to "test" a circuit unless the service information explicitly supports that method.
• If a replacement relay fails immediately, find the short circuit, overload, water intrusion, or terminal damage before installing another relay.
• Keep relay replacement within the vehicle manufacturer's service information and warranty requirements.

Related Parts Universe links

• Shop Bosch 0986332402 changeover mini relay
• View Bosch 0332209158 relay reference
• Browse relays and flashers
• Browse electrical and electronics
• Browse sensors, relays, and electrical
• Browse fuses and accessories

For buyers, the main takeaway is simple: Bosch 0986332402 is not just "a 5-pin relay." It is the documented Bosch successor path for 0332209158 with a diode coil connection and 30/20 A changeover-mini-relay specs, so match those details before buying or swapping.

A relay is easy to overlook because it is usually small, inexpensive, and hidden in a fuse box or auxiliary bracket. But on a high-current circuit, replacing it by shape alone is a gamble. The buyer-friendly question is simple: does the replacement match the circuit's current demand, pin layout, coil protection, mounting style, and service information?

Bosch 0332002159 is a power relay Parts Universe carries for shoppers who need a 12 V, 100 A, normally-open relay. Bosch's relay catalog places part number 0332002159 in its 12 V normally-open power-relay section and lists it as a 4-pin, resistor-coil relay with a mounting bracket and 100,000-cycle lifetime entry.

What Parts Universe lists

Parts Universe currently lists this item as Bosch 0332002159 Normal Open Power Relays, 12 V, 100 A, 4 Contacts, Resistor. The active Shopify product record verified for this article shows:

• Parts Universe SKU: BSH-0332002159
• Manufacturer part number: 0332002159
• Barcode: 03165141212778
• Current Parts Universe price: $32.99
• Current inventory: 92 units
• Current status: active and available for sale

What Bosch verifies

Bosch separates relay families by job size. Its public relay information describes power relays as products used for switching operations in engines, starters, and other large consumers. In Bosch's relay catalog table, 0332002159 appears under 12 V NO power relays with these key attributes:

• Product family: power relay
• Part number: 0332002159
• Current: 100 A
• Number of pins: 4
• Coil connection: resistor
• Mounting bracket: yes
• Catalog lifetime entry: 100,000 cycles

When a 100A power relay makes sense

This is the kind of relay to consider when the original circuit was designed around a high-current power relay, not a small micro relay or generic accessory relay. Typical buyer situations include replacing a missing or failed relay where the original part number, service manual, or relay markings call for the same Bosch number or matching electrical specification.

Do not upgrade to a higher-current relay as a shortcut for a wiring problem. A 100 A rating only helps when the rest of the circuit is designed for that load: wire gauge, fuse protection, connectors, terminals, mounting, heat, and duty cycle all still matter.

Five checks before ordering

1. Match the part number first. If the removed relay is Bosch 0332002159, this listing is the direct product to review. If it is a different number, confirm a documented cross-reference before substituting.
2. Confirm 12 V normally-open operation. A normally-open relay behaves differently from a changeover relay, latching relay, or normally-closed relay.
3. Count the pins and compare the diagram. Four pins are not enough by themselves; terminal numbers and the circuit diagram must also match.
4. Check coil protection. Bosch lists this part with a resistor coil connection. Do not swap resistor and diode-protected relays casually in electronically controlled circuits.
5. Check mounting. Bosch lists a mounting bracket for this part. That matters when the relay is secured near vibration, heat, or service access points.

Safety notes for relay replacement

• Disconnect the battery when the service procedure calls for it; Bosch's relay-change guidance specifically warns about preventing discharge and short circuits.
• Do not bypass a relay socket with wire or tools to "see what happens" on a high-current circuit.
• Inspect terminals for heat discoloration, looseness, corrosion, or melted plastic before installing the new relay.
• Replace damaged sockets or terminals instead of relying on the relay to mask poor contact.
• If the fuse opens again after relay replacement, diagnose the load and wiring before installing another relay.

Good fit, bad fit

Good fit: your service information or original relay calls for Bosch 0332002159, a 12 V normally-open 100 A power relay with 4 pins, resistor coil protection, and a mounting bracket.

Bad fit: you only know the relay is black, square, or has four terminals. Relay housings can look similar while the internal circuit, coil protection, and current rating are different.

Related Parts Universe links

• Shop Bosch 0332002159 12 V 100 A power relay
• Browse relays and flashers
• Browse electrical and electronics
• Browse sensors, relays, and electrical
• Browse fuses and accessories

Bosch 0332002159 is a practical choice when the spec sheet, original relay, and circuit design all point to the same high-current relay. Match the number, verify the circuit, and treat any heat-damaged socket as part of the repair instead of an unrelated detail.