2018 Audi TT Electrical Switch & Relay Parts

This table covers the relays that control the A/C Condenser Fan Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: HELLA 933332451.

This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

3 A/C Refrigerant Pressure Switch parts for the 2018 Audi TT come from 3 brands — FOUR SEASONS, UAC and VNE.

Listed part numbers: FOUR SEASONS 37427, UAC SW11224C and VNE 4016002.

This table covers the relays that control the Accessory Power circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2018 Audi TT — HELLA 933332451.

This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

2 Brake Light Switch parts for the 2018 Audi TT come from 2 brands — HELLA and WELLS.

This group includes HELLA 008622991 and WELLS 1S10862.

This table covers the relays that control the Fog / Driving Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: HELLA 933332451.

This table covers the relays that control the Fuel Pump / Circuit Opening circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: HELLA 933332451.

This table covers the relays that control the Horn circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2018 Audi TT — HELLA 965453801.

This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

3 Ignition Starter Switch parts are listed for the 2018 Audi TT, from WELLS and ROSTRA.

Listed part numbers: ROSTRA 630052, WELLS 1S10953 and WELLS 1S17907.

This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

3 Multi-Function Relay parts for the 2018 Audi TT come from 3 brands — BOSCH, ÜRO PARTS and WELLS.

Listed part numbers: BOSCH 0986AH0082, ÜRO PARTS 7M0951253A and WELLS 1R1007.

This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch. Read more

9 Oil Pressure Sender / Switch parts for the 2018 Audi TT come from 6 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, REIN and 3 other brands. The "Popular" part is HOLSTEIN 2OPS0056.

The Economy section lists 2 options from HOLSTEIN and REIN — the catalog's value-priced group. HOLSTEIN 2OPS0056 is listed in this group.

In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, FACET and WELLS supply 5 parts: built to original-equipment specification. A representative part number is FACET 250053.

2 further parts sit outside the graded sections, with the same engine-level match.

Listed part numbers: HOLSTEIN 2OPS0056, REIN ELP0078 and FACET 250053, plus the other parts above.

This table covers the Power Seat switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

VEMO supplies both parts for the 2018 Audi TT.

Economy: 1 part, from VEMO. A representative part number is VEMO V10730475.

The Standard Replacement section: 1 option from VEMO. VEMO V10730557 is listed in this group.

Listed part numbers: VEMO V10730475 and VEMO V10730557.

This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2018 Audi TT — HELLA 933332451.

This table covers the combination / turn-signal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

This group shows a single part: VEMO V15800039.