1991 Buick Regal SENSORS

SENDING UNITS & SENSORS LOCATION
ComponentLocation
ABS Wheel Speed SensorBehind each wheel hub.
A/C Pressure Sensor

2.3L VIN "D"In left front of engine, on A/C line.
3.1L VIN "T"In left front of engine, on A/C line. 3.4L VIN "X"In left front of engine, on A/C line.

Coolant Level Sensor
3.1L VIN "T"On rear of radiator.
3.4L VIN "X"On rear of radiator.

Coolant Temperature Sender On lower left rear of engine, below throttle assembly.

Coolant Temperature Sensor (CTS)

2.3L VIN "D"On top left side of engine, below coolant outlet.
3.1L VIN "T"On top left side of engine, below coolant outlet.
3.4L VIN "X"On top left side of engine, below coolant outlet.
3.8L VIN "L"On top left side of engine, below coolant outlet.
Camshaft SensorOn right side of engine.

Crankshaft Sensor
VIN D On lower front of engine, near oil filter.
Except VIN D On right side of engine.

Detonation Sensor
VIN DOn lower left rear of engine.
Except VIN D On right rear of engine.
Knock Sensor Below exhaust manifold, at right rear of engine.
Mass Airflow (MAF) Sensor On top left side of engine.
Manifold Absolute Press. (MAP) Sensor
VIN DOn top front of engine.
Except VIN D On top rear of engine, on intake plenum.

Manifold Air Temp. (MAT) Sensor
2.3L VIN "D"On left front of engine compartment, on air intake assembly.
3.1L VIN "T"On left front of engine compartment, on air intake assembly.
3.4L VIN "X"On left front of engine compartment, on air intake assembly.
3.8L VIN "L"On left front of engine compartment, on air intake assembly.
Oil Pressure Sensor
3.1L VIN "T"On left side of engine.
3.4L VIN "X"On left side of engine.
Throttle Position Sensor (TPS)
2.3L VIN "D"On throttle body.
3.1L VIN "T"On throttle body.
3.4L VIN "X"On throttle body.
3.8L VIN "L"On throttle body.
Vehicle Speed Sensor (VSS)
2.3L VIN "D"Behind right rear of engine, on transaxle.
3.1L VIN "T"Behind right rear of engine, on transaxle.
3.4L VIN "X"Behind right rear of engine, on transaxle.
3.8L VIN "L"Behind right rear of engine, on transaxle